Nope that's fine, I know healers that run max Acc/Det (WHM) and Acc/Crit (SCH) for DPSing - especially when pushing Savage pre-2.4

Acc/Det (WHM) & Acc/Crit (SCH) are for DPS intentions
Crit/Det are for max healing output
Pie/Det (WHM) & Pie/Crit (SCH) are for progression (and Dreadwyrm Codex is stupidly Pie/Crit lol)