I think Oracle is kinda “good” with anything because it is just a full support class… but it is not too strong in general because it is not about damage and as you said not all of its skills are always useful. Also I think counter spell could make your Capella disappear so you have to be cautious with it. So I think it is a quite hard class…maybe later when there are enough ranks you could complement it with something but still maybe it is a bit of suffering. Dunno…but I’m not sure Oracle is better with any other classes. Maybe for Monk because of the Stamina skill but I don’t rly see other synergies of that class.
The morph skills aren’t that good for Druid but otherwise the other skills are quite strong.
Carnivory is a rly strong magic damage skill. Telepath can be nice in pvp. And I think Sterea Trofh is a nice protective skill.
So yeah Druid is quite good imo.
Also you could find a useful monster skill with the morphing part but when you transform you don’t have Auto Attacks so it isn’t necessary the best combo with Chaplain…but the other skills are good.