Originally Posted by Bungboy
This idea is actually not that bad and I wouldn't mind it. The mana cost increases by 100 every time he ults. If he doesn't ult for 8 seconds or something, the mana cost is set back to normal. But he's nowhere near op, so if he got this change then he would need to get the rest of his kit buffed accordingly.
You realise that his mana pool is quite small to begin with. You basically want him to use no other skill for him to even attempt ulti chains (because you know using Decimate, Apprehend and Crippling Strike doesn't take mana). If you want the increasing mana cost on his ulti by 100 per use, then give him something to make his other skills viable. Say, all other moves have their mana costs halfed and are 50% more effective then what they are currently.
For someone who is supposed to be in the fray of melee combat, he lacks innate tankiness and/or sustain to get to the fray, and he lacks any form of true gap closer to actually give him the boost he needs to get into the fray. He has issues that the other bruisers lack. Leave his ulti, since it's the only thing that makes him decent to use.