I'm confused as to why so many people in this thread sound like they don't have enough Addersgall and they don't have enough movement tools. I'm often slightly low on MP because I've been sitting on three stacks of Addersgall because sage has so many free oGCD heals. And as for movement, slidecasting, one reserve charge of Pneuma, and three starting Adderstings (plus three more when there's downtime) should be enough mobility for any Lv90 content outside of Savage, and in Savage things should be planned out well enough that you can manage without other tools.

I'm not saying sage is perfect but the only thing I feel is really missing is an AoE Kardia (Echokardia?) on a 90s or 120s cooldown.