I don't agree with basing your numbers off perfectly timed voidwatch staggers. 40 a fight is much more reasonable for a long fight (read: where staggers are being stupid and taking ages). Up to 120 is just rediculous.
Also I'm not sure how you go through more oberons than bronze. Are you getting dispelled regularly? Why? You can QD and WS from like 16-18" away, there's no real reason to be in AoE range. In fact, that's one of the reasons why Cor is so good - you can put up about 20k damage before capping hate, and do it from completely outside almost all AoEs.
If you're not getting dispelled then with Tacticians/Misers, it's rare I ever fire more than one shot between WS, and if QD's up (usually is 1/4 of the time) then I don't need to fire at all. I don't feel it's worth shooting again if you're only a few ticks regain off another WS, it'll take longer than it would to wait on regain, and the damage of normal TP shots is pretty pathetic.