Siege Breakers isn't a bad idea, but IMO the AoE for fist of havoc if anything should be dialed down; either in overall size of the area that gets affected, how high the damage goes vertically, or how it seemingly goes around obstacles to deal damage to guardians around corners or in hiding, when the blast radius of a rocket launcher does not. That, and I think the attribute bonus is a bit high on intellect if you're also giving a +50 buff to strength; looks well beyond any other titan exotic in attribute bonuses. And titans already have a way to blind (flashbang for striker, helm of saint for defender) that I think the blinding ability goes too far on your other one. I understand both this and helm of saint are exotics, but allowing the additional ability for strikers to blind would throw some balance off IMO. Initial ability could be a melee cooldown on picking up a super orb, or perhaps allow a second charge to both melee abilities like the Claws of Akamhara do for the warlock.