So i am thinking about TR-ing a bard into a WF acid savant, that is the only past life he's going to have. I'm not quite sure though about the feats, I've seen Power Word Kill and Web are both Conjuration spells just like most Acid damage spells, i'd like to be able to land both in the easier epics if that's possible? How would i go about choosing the feats here? Is it worth it going for a spell pen feat or should i just go for SF or GSF:conjuration only?