A few questions about the build

How many summons are available at one time?

Which summon is the best?

What other skill class to compliment?

if anyone has a good build please post

Thank you

I'm not sure which summon is the best.

Illusion is a good compliment because you can hide while your summon kills, or use frenzy to cause total mayhem while your summon does work.

You can summon up to two atronach's with a certain perk.