I have been using conviction less and less recently simply because its a pain in the butt to build it manually and the masteries are put to better used on dow/eob/aggression. The heal from it is pretty nice but it's hardly ever useful and not worth it for a 5 length gambit. If you're sitting idle and you hit conviction then that by definition defeats the purpose of it, if your group needs heals 2.4k heal in 24sec is hardly a game changer.
IMO the skill needs to be buffed a little and needs to be made less of a rotational skill and more a light group emergency skill .
I was thinking since it's thematically a group skill we either make half of the heal up front ~1.2k and the hot stays the same for the full 24sec duration.
Another way would be to make it put a +5% inc heal buff on the group and everything else stays the same. That way it could become a semi group emergency skill when the entire group is low on morale.
Both the above wouldn't make it spam abusable as we need to do other more important things in our normal rotation, specially if we scale the power cost up by a bit. The first solution also in a way resembles guardian's shield wall. Often I find myself at full morale but my dpsers taking AoE dmg and I feel stupid hitting conviction for them as by the 3rd tick either the healer is able to make the group stable or they're all dead. This way I'd be more useful to the group.
What do you guys think? How often do you used conviction?