Order of value change after enchantment

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If you are low level get "Turn Undead" enchantment and craft some dagger to enchant them. 

With 20%-30% better prices you get your gold back. If you are over level 22, it is very fast way

to level up enchanting. Buy a Banish Daedra weapon, which is expensive, and enchant 

the daggers with this. Even with no better prices boost, you get make a lot of gold and level up 

enchanting very fast. Another valuable enchantments are Paralyze effect and Absorb Health. 

But the best way is to wait until level 22 and get the Banish effect.

Enchanting boots over and over again with the muffle enchantment is really good, because 

the size of the soul gem is irrelevant with muffle. Since everyone in Skyrim is wearing shoes, 

you can stock up a ton of them. Selling them is profitable too.

Probably the most efficient way to train Enchanting and additionally earning good amount of money 

is to enchant cheap items—most notably Hide Boots and silver rings—with Fortify Sneak enchantment. 

Along your travels around Skyrim, you should gather these cheap items and possess The Black Star 

by completing "The Black Star" with going to Nelacar instead of Aranea. After acquiring these items 

and Fortify Sneak knowledge, you can soul trap any Men or Mer enemy, enchant Hide Boots or Silver Ring 

with Fortify Sneak, go back for another soul and repeat this process.

Some enchantments will improve the selling price of the base item more than others. 

In order of descending value:

Weapons:

Banish

Paralyze

Absorb Health

Damage Stamina

Absorb Stamina

Absorb Magicka

Damage Magicka

Fear

Frost Damage

Shock Damage

Fiery Soul Trap

Fire Damage

Soul Trap

Huntsman's Prowess

Chest:

Fortify Destruction

Fortify Healing Rate

Fortify Conjuration

Fortify Smithing

Fortify Restoration

Fortify Health

Head and Circlet:

Fortify Archery

Waterbreathing

Fortify Destruction

Fortify Conjuration

Fortify Restoration

Hands/Feet:

Fortify Sneak

Muffle

Fortify Carry Weight

Fortify One-Handed

Fortify Two-Handed

Fortify Stamina

Jewelry:

Waterbreathing, (the most valuable in lower Enchanting levels)

Fortify Sneak, (the most valuable in higher Enchanting levels, since it scales)

Fortify Carry Weight

Fortify Barter

Fortify One-Handed

Fortify Two-Handed

Fortify Archery

Fortify Destruction

Fortify Healing Rate

Fortify Conjuration

Resist Magic (greater)

Fortify Block

Fortify Smithing

Fortify Restoration

Fortify Illusion

Fortify Alteration

Fortify Health

Resist Shock

Fortify Magicka

Resist Frost

Resist Magic (lesser)

Fortify Alchemy

Fortify Stamina

Fortify Light Armor

Fortify Unarmed

Fortify Magicka Regen

Fortify Magicka

Shield:

Resist Magic (greater)

Fortify Block

Fortify Health

Resist Shock

Resist Magic (lesser)

Resist Frost

Resist Fire

To maximize skill gain, activate the Mage Stone and 

sleep in a bed to obtain a rested effect, (unless a werewolf).

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The value of the enchantment effect in Skyrim seems to be inversely proportional 

to the # of base uses for that enchantment.

With a ratio of 5.5, the Banish effect gives you the most money per item. 

You can easily make iron daggers with banish 

that's worth more than 2000 septiums with a lesser soul gem.

For armor and jewelry enchantments, 

the Waterbreathing effect is the most valuable for petty soul gems and 

Fortify Sneak for anything with lesser soul gems or higher. 

But Banish easily out classes any armor enchantments in terms of profit.

If you are mass enchanting your items, it is more profitable to do so with weapons. 

Weapon enchant prices are calculated by base uses; 

the fewer base uses an enchant has, the more expensive the enchantment will be. 

The Banish enchantment is by far the most profitable weapon enchantment.

Here are the Weapon Enchantments sorted by base cost:

113 Banish

034 Paralyze

031 Absorb Health

029 Turn Undead

029 Damage Stamina

022 Absorb Stamina

021 Absorb Magicka

016 Fear

015 Damage Magicka

014 Shock

011 Fire

010 Frost

009 Soul Trap

And here are the Apparel Enchantments sorted by base cost:

672 Sneak

393 Carry Weight

369 Two-Handed

369 One-Handed

352 Archery

256 Destruction

251 Healing Rate

246 Conjuration

236 Smithing

235 Block

231 Restoration

226 Illusion

206 Barter Prices

206 Alteration

202 Health

196 Resist Shock

188 Magicka

187 Resist Magic

186 Resist Frost

184 Pickpocket

176 Resist Fire

168 Lockpicking

167 Alchemy

161 Stamina

157 Heavy Armor

137 Light Armor

125 Stamina Regen

105 Muffle

100 Waterbreathing

088 Unarmed

055 Resist Disease

053 Magicka Regen

039 Resist Poison

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Method for Maximum Strength Potions and Enchantments

Prerequisites: 

Level 100 in Alchemy and Enchanting, 

five perks in alchemist, 

one perk in Benefactor, 

five perks in Enchanter, 

one perk in Insightful Enchanter, 

three pieces each head and hand apparel with no enchantments, 

three rings with no enchantments, 

three amulets with no enchantments, and 

twelve grand souls.

Craft a set of Fortify Alchemy gear.

Craft several potions of Fortify Enchanting at 30% boost.

Craft a new set of Fortify Alchemy gear at 28% boost with the aid of the potions.

Craft several potions of Fortify Enchanting at 32% boost using the new set of gear.

Craft a final set of Fortify Alchemy gear at 29% boost with the aid of the potions.

Without utilizing the glitches, 

usually by playing with various mods intended to fix the glitches and bugs, and 

therefore not using the 2 headwear pieces glitch and vampire necromage glitch, 

the possible numbers are 

41% alchemy/smithing gears, 

44% enchanting potion, and 

174% smithing potion.

There is an alternative that is the exploit of the use of Fortify Restoration potions, 

which improves several status, including Fortify Enchanting. 

Also, there is an added ability called Seeker of Sorcery from the Dragonborn DLC 

which makes enchanting 10% more effective. 

The ability can be gained at the completion of the quest Black Book: The Sallow Regent. 

It goes very well with Ahzidal's Armor set, as it increases skill in Enchanting by 10.

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Effect Charges and Strength[edit]

Apparel[edit]

The net magnitude of the effect is follows this formula, rounded down:

net magnitude = base magnitude * soul multiplier * skill multiplier * (1 + Enchanter perk) * (1 + specific perk modifier)

Soul multiplier is as follows:

Class	Multiplier
Grand	x1
Greater	x2/3
Common	x1/3
Lesser	x1/6
Petty	x1/12

Skill multiplier is 1 + (skill/100) * (skill/100 - 0.14) / 3.4. Overall, 100 skill points will grant 25% increase over the base magnitude. The potions will increase your skill in the formula by their given percentage. Maximum possible natural (without potions) multiplier with 100 Enchanting, 5 levels in Enchanter, appropriate +25% perk and Grand soul is 3.125x. With potions (without exploiting fortify restoration effect) the maximum is 4.21875x.

Weapons[edit]

For weapons, you can select the magnitude of the effect up to a maximum. The maximum magnitude is similar to apparel, but not affected by the soul used:

Maximum Magnitude = base enchantment magnitude * skill multiplier * (1 + Enchanter perk modifier) * (1 + specific Enchanting perk modifier)
                   * (1 + elemental Destruction perk modifier)
                   + effect's base magnitude * skill multiplier * (1 + Enchanter perk) * (Potion effect)

The number of uses does depend on the soul used, but not on perks (assuming maximum magnitude is used).

 Charges Per Use = 3 * (base enchantment cost * magnitude / maximum magnitude)^1.1 * (1 - sqrt(skill/200))

 Net Number of Uses = soul charge capacity / charges per use

Note: base enchantment cost must be calculated according to the formula listed here when the enchantment is set to "Auto-Calculate"

Soul charge capacities are as follows:

Class	Capacity
Grand	3000
Greater	2000
Common	1000
Lesser	500
Petty	250

If the weapon has two effects, the charges per use are added together, resulting in fewer uses.

The soul multiplier is the same as for apparel.

A graph of the net use multiplier by Enchanting skill level: