How much do a balance druid have to outperform a spriest to rightfully claim the DI buff? Or is it that much more of a dps boost for the spriest, that it's not ever gonna be a boost for the raid dps to give it the the druid?
Logs for today: http://www.worldoflogs.com/reports/xes8i266u3ed8wo2/
The only fight with mechanics for drawing a fair comparison (shannox because of mostly stand and nuke vs aoe fest) has the spriest over you.
Beth = spread sunfire on everything while popping shrooms under little adds. Spriest wasn't in that fight with you so no way to compare.
Rhyo = looks like most of your dps was from shrooming little adds. Spriest had a lot more damage done to the boss. Again spriest outdid you and deserved the DI since shrooms get nothing from it.
Alys = spriest did more damage to alys in the fight, despite being lower dps overall. This is the only fight in which I would say you deserved DI over the spriest and the haste/dot buff would have actually been better used.
Not sure from your post if you were trying to imply that you were vastly superior to the spriest in dps or not, but the logs you linked do not support that claim.