I agree, MCH need some serious attention. The idea of the Chainsaw isn't actually bad ! Giving you a special "weapon" that change some of your skill, allowing you to pick up one effect to use, like a Strong instant attack, a long DoT (30 seconde ?) or why not, some way to buff himself (like damage increase). Depending on how the boss can react (Soon untargeatable, Burst phase etc...) this can allow much more flexibility and add a fun to this class