>>544599642
As a follow up, these wedges did not seem to benefit Samael when inserted into the normal melee weapon:

Crit DMG from Rage
Smash Atk from Crusher
ATK from Impetus

So so far, just combo extension effects seem to work. They work very well, in fact, and both Continuity and Continuity.Trammel add their full durations, giving an extra 12 seconds to Samael's base 10 second combo timer.