I'd just pull Bioblaster out of the combo and toss it as it's own button, next to Scattergun, but also make Scattergun and Bioblaster share a cooldown with each. They could even take Analysis off Bioblaster and keep the damage/DoT and just give it a flat -25% movement/health recovery as the trade for not punting back, but being in melee. This is why I've been playing Bard strictly, especially in Frontlines, compared to MCH.