For SCH, I'm still learning the best way to do it myself. Currently what I do is:

1) Adloquium just before the pull. (Will also Stoneskin once I level up my WHM)
(Lustrate?)
2) Switch to Clerics, Precast Shadow Flare as they are gathering up the mobs to their final location
(Lustrate?)
3) (optional) switch back and add another Adloquium depending on how hard they are hit
(Lustrate?)
4) Eye for an Eye, Switch to Clerics
(Lustrate?)
5) Bio II -> Miasma -> Bio -> Bane -> Miasma II
(Lustrate?)
6) Switch back and heal.

I'm finding if I'm in a really AoE heavy group (2 BLM for instance) that I don't end up bothering with dots aside from Shadow Flare as the mobs don't end up taking many ticks of damage regardless. Am I missing something I should be doing?