I'm a runecrafter on my bard and I am wondering a few things about what to slot.

Does Physical or Spell crit apply to our songs, codas? If physical then I should be also slotting Dex/Str, if spell should I be adding Int and obtaining caster daggers?

The Infiltrator souls has me interested. The left side of the tree adds armor penetration, physical dmg increase. But also augments finishers. Are codas considered finishers? All other rogue souls call them finishers, but the bards are called codas. For the purpose of the augments in the infiltrator line, these should effect codas as well?