I was wondering if anyone could tell me what type of attack(s) blast charges and detonate are considered.

They don't list a weapon requirement so I assume anything that buffs weapon attacks does not buff them, but they do physical damage so buffing non physical damage doesn't seem to fit either.

I am trying to determine what other classes to take with sab. My original build has sin/sab/nb but most of the talents/abilities weren't being used, such as hellfire blades, serrated blades and poisons.

I understand the sin talent that buffs poison damage will work, but does the sin 4% to physical damage work?

I appreciate any thoughts/ suggestions.