Fast travel when I would be over-encumbered except not because of a temporary effect

Save the game, press 'T' to check the day and time, fast travel to the place, press 'T' again to see how many days have passed. That will tell you how long the fast travel time is between those two spots. Re-load the save if you aren't happy with your purchase.

Fortify potions in Skyrim DO NOT STACK.

If you already are under the effects of a fortify enchantment from a potion effect, and you drink another one, you will not benefit from both fortify enchantments. (I am unsure if the old one is blown away or the new one is ignored, but you will definitely not benefit from both.)

The reason why you want 5/5 enchanting is to allow you to make the armor set with the highest possible fortify alchemy. The reason why the instructions asks you to make multiple fortify enchanting potions is because time does not freeze while you are enchanting your armor. If you take too long, you will have to use another enchanting potion.

The best potion you can make in the game requires 5 armor pieces:

• Falmer Helmet (There is a glitch where you can wear both a falmer helmet and circlet at the same time)
• circlet of some kind
• gloves
• ring
• necklace

You will also need all 5 alchemist perks as well as the welfare perk. To make the highest set of alchemy armor, you will need the 5 enchanter perks, and the insightful enchanter perk.

Here are some more questions that may help you:

• Maxing out gear with maxed out smithing enchanting and alchemy
• Fortify alchemy fortify enchant stacking
• How do I create Fortify Alchemy enchantments up to 29%?