For Preemptive Optimization, I think 3.75% recharge is too low for it to need 5 slots to use. Other uncommon sets like Crushing Impact and Doctored Wounds have 5% recharge at the same slotting. I think it should be moved up or raised to 5% to be in line with the rest of the uncommon sets that have recharge bonuses at the 5th slot. On that same note, why was, Bombardment a rare set, reduced to 5%? That's what the uncommon sets have at the 5th slot.