Depends on level, your healer and your party. With good AoE DPS they're fine, at least with WHM and AST (haven't played SB SCH so no comment on that), if the tank is good. As a healer, I prefer large pulls in all SB exp dungeons at least - if the tank and the DDs can handle them. They only become horrible if tank isn't properly geared and / or using cooldowns well or if the DPS is super slow.