Got Dragoon 50 recently, what to roll next?

[Garnatian]

Cleric Stance > Bio II > Miasma > Bio > Bane > Shadow Flare > Thunder/Aero on each target that still has a good amount of HP.

I personally wouldn't touch Thunder/Aero, but mainly Thunder due to the fact that you cannot use abilities like Lustrate whilst casting and you cannot spread it. I'd much prefer fill the gap with Ruin II spam. I used to like Ruin II mainly for the ability to heal with my pet whilst DPSing, however since the patch that isn't an issue, but since spamming Ruin II presents no mana issues, I still use it over Ruin II for the extra mobility. As for the Order of your abilities, Shadow Flare + Miasma II are better first for AoE pulls, while for single target, the order is fine (with no Bane of course).

[Trayes]

I personally wouldn't touch Thunder/Aero, but mainly Thunder due to the fact that you cannot use abilities like Lustrate whilst casting and you cannot spread it. I'd much prefer fill the gap with Ruin II spam. I used to like Ruin II mainly for the ability to heal with my pet whilst DPSing, however since the patch that isn't an issue, but since spamming Ruin II presents no mana issues, I still use it over Ruin II for the extra mobility. As for the Order of your abilities, Shadow Flare + Miasma II are better first for AoE pulls, while for single target, the order is fine (with no Bane of course).

Thunder is 240 pot and Aero is 200. Why wouldnt you be casting these? You like your 80 pot ruin?

Also you Bio II > Miasma > Bio > Bane first so your tank get get some solid threat because you will be pulling a lot.