I think that macro is a big waste , sometimes you dont have anyone to "Bane" around and you wont gain a stack and the whole marco will end in a big fail, and alot of times you dont even need Deathflare to finish someone you can just save it to finish someone else or do big dmg on a group that is stacking together.Could work yeah but i feel like its a waste, for lazy summoners maybe if they dont mind failing now and then.