Dread Lord Help

I already started my Death Knight, but than I wanted something else. I call it the Dread Lord, it uses a 2 handed weapon, Heavy armor, and Conjuration. It summons 2 Dremora Lords ASAP before battle and than just fights. The problem is I don't know how much magicka I will need, any thoughts?

It's an Expert spell and cost 358 magicka to cast. If you have Expert Conjutation, two will cost you 358 magicka. Then there's conjuration gear...

358 is the base cost, it doesn't account for having 100 Conjuration, which you will if you summon 2 of something. That means one will cost 215 without the Expert perk, and 107 with the Expert perk. And like Jaeger said, there is always Conjuration cost reduction gear too. I think all you need is just enough to summon them both, so about 220 Magicka depending on your gear. You can always wear +Magicka gear if you think it's necessary.

If you want to dual cast each one for double duration, it will cost A LOT more Magicka, 300 each one with the perk and with 100 skill. You should probably get into cost reduction if you want to dual cast them. I take it this will be your only magic skill? You probably don't want to invest too much into Magicka so you can get your Health and Stamina up.

Alrght thanks!