Look, these guantlets cast a 110 point dot, 40% snare spell - this spell stacks with the SK disease and fire line of dots, which means that an SK can toss on heat blood (170 point dot) and heart flutter (144 point dot/debuff combo) and have all three riding the target mob at once - that's 426 points of damage, plus debuff plus snare effect for only two thirds of the normal cost of casting those.
Plus you free up a spell slot.
Plus you aren't paying any mana for the spell.
Plus I'm wearing silver chitten hand wraps right now so the AC of these things is moot to me.
So the only question is - WHEN DO THEY PROC?