Well actually you shouldn't do nukes outside BR, why wasting MP when you know the dmg is gonna suck? Also the BR should be so quick you don't feel the need to nuke outside it. But it's much better to cast debuffs rather than spamming Spirit Dart, with the proper equip they always land and they are a great help.
With Paralyze and Syphon TP the NM can barely move and they land fine even as a Conjurer; also elemental debuffs casted before BR gives a nice boost at the dmg of the nuke, so I can't see where you find the time to spam 1 1 1 1 1 o.O