Scholar and White mage both have dps capability and can equally stance dance. The only difference was that scholar had Lustrate which was not affected by the -20% healing debuff of cleric so theoretically Sch could heal in cleric nearly all the time. This has changed in 3.0 with Lustrate now having healing potency and not straight % heal. SCH in 3.0 will now need to drop cleric to use lustrate - so basically stance dancing is more or less equal between the two at max level. My rule of thumb is to gauge how much damage the overall party is receiving. If its not much, after the tank has enmity post pull, I'll pop divine seal regen on tank, perhaps medica 2 on DPS then hit cleric to holy the mobs away.

Sometimes you cant do anything about a bad group. You can try and advise and suggest strategies (in a polite way) and if they won't listen or you keep getting the same results then it probably wont go anywhere and you should abandon.

Swiftcast is mandatory.