>So axe kick will only maledict with the echo yeh?
Correct, and you can never get the echo against a larger opponent.

>And while Im asking what do sleep/confusion darts do?
Confusion I never figured out since it seems to have little effect on mobs and darts are rarely worth it in PK, but fully successful sleep darts cause "slow" as in the spell, dropping the victim's melee ability noticeably and makes them unable to do certain moves that can't be done while slowed (backstab, flurry come to mind).