Which Healer has the best DPS Solo

[Eloah]

It depends on the kind of DPS you are referring to, sustained or burst, and whether they are alone or not.

For burst DPS, WHM wins hands down, with AST in second and SCH last. This is not only a combination of their main DPS spell, but the rest of their oGCD kit. SCH is a Dot job, so that's where most of their damage comes from.

For sustained DPS, SCH reigns supreme, as they always have. Since they use DoTs as their primary means of damage they are able to attack and heal simultaneously. AST and WHM are almost tied for second and third, with who being where is more player dependent. But WHM is usually last since their spells cost more than an ASTs. But it should be noted that a portion of AST sustained DPS is dependent on their card draws.

Now as for a more definitive answer as to who has the best DPS, the best answer would probably be SCH. The main reason being, most fights are designed for sustained DPS over burst. There may be burst phases, but no fight is just bursting the enemy down.