Originally Posted by And it was K
I'm a little afraid to try it on Corki. Still just feels like I'd be dumping too much into useless mana until Manamune is full. What am I going to use the mana for? Missle spam? Trinity Force grants enough mana for that. Muramana looks pretty sweet, but again, why would I build that much mana to begin with?
I actually run out of mana on Corki quite a bit, especially mid-game when pre-fight poking lasts a long time. Late-game it's not that much of an issue.
I ran the math and found that with a Triforce, Muramana gives +38 AD from its passive (for a total of 58, which is close to an unstacked Bloodthirster). With its toggle active and at full mana it's added an extra 114 damage, which is enormous, although this obviously decreases with use.
In terms of adding to that initial burst it actually looks much more cost-effective than a Bloodthirster.