the more powerul it is the more it drains you.
hence why a simple skeleton rates like a 12 or something, its useless. the 3 I use now actually kill almost anything they come across, and are much more powerful than the daedroth I was using b4, and the deadroth is almost as good as the dremora lord.
when you check a summon spell, check its #'s under the lightning symbol, that will tell you how good it is. It also goes by price. The dremora lord was only 505 gold, the 3 I bought were between 950 and 1,050, powerful bastards indeed

You gotta make sure all your summons are of the same duration. A 45 second clannfear may cost the same as a 30 second daedroth, but that doesn't mean the clannfear is as good as the daedroth.
I currently cast the 45 second clannfear summon at around 150-160. I'm around 75-80 in conjuration (it's a Minor Skill too!!).
So easy to level up. I didn't train it either.
I have 208-ish magicka and I'm going to enchant my gear with +magicka. I mean, sure, getting + destruction and + conjuration is cool because it makes your spells cheaper, but having more magicka has a stronger effect on how many times you can cast a spell before you're out of blue.
I'd just like to start casting some powerful destruction spells.
I have two + 50 magicka sigil stones. Do you think I should enchant it onto some of my glass stuff or enchant my gear with something else?