Wand templar problem.

My wand templar is suffering mana regen ever since i got my 5L armour. I put chain power siphon weapon elemental GMP and life leech. It became insane, it cost 140 mana to cast a single GMP power siphon and my mana regen is only 137.6 per second! I can't even handle it?! I mean how does krip even manage his mana regen when casting so many times. Any explanation? PS. Using the same build his going

Whats your mana pool/what auras are you using/how much of it is reserved?

Wand builds are extremely cost intense and I've been personally running LMP until something around lvl 77 with my wander until i was able to make the transition to GMP.