notNot sure if this applies but iI was testing different spellsword combinations and found iI did ALOTA LOT of finishing move kills even from >80% health if iI was healing in left hand while spamming attack after they power swing.
iI would slash, move back, cast heal (wait for their attack), dodge, spam attack (while still healing) and move forward or to the side towards the enemy.
seemedSeemed that out of 8 enemies (whiterunWhiterun guards) iI did 6 in this way. an impressive stat as they are normally on the tougher side.
noteNote: you can cast heal while attacking if you dontdon't move or power attack.