The lilies does influence the recast of benison however it's marginal you might just want to cast it with one, that said the ability is good and most of the complaint are exxaggerated with ppl even claming that SS absorbed more dmg than benison (maybe the ARR one but we have long lost that)

considering how easy is actually to get a lily (especially in 4.05) I don't see why ppl claim that it's harder to use than SS