I dont think putting the backlash at 100% is the best idea. One misstimed crit and you just die.
I think the execute idea is probably the best, gives them an instacast filler that doesnt hit that hard and a gigaslap during an npc or players execute phase.
I still return to my previous argument that no instacast that requires 0 setup should hit thay hard
Prime example. My highest conflag crit to date is 1200ish… that requires. That I have cast incinerate in the past 15 seconds, crit in the past 10 seconds, and have immolate on the target… If I just immolate conflag it crits around 800-900ish… also conflag is a 31pt talent.