1: don't know but it seems to be some long forgetten loot, you mention time to erase you and bass lines to replace you. Song of Ir Yuit(spelling?) 2. Pulse rifles. They were neglected for a very long time and are the meta now. Other guess for 2: titans, they were mocked for their lack of power against hunters as hunters were all offensive capabilities, and you say " you will beg for mercy" it makes me think of the crucible.