All the times I've gone into towers as a PGL, ACN, THM, or ARC, I ended up being top or near top dps. Would that have been the case if I was in an alliance with players that actually knew and played their jobs correctly? Of course not. I do find it highly amusing that there are people berating the OP for not going WHM so he could have carried even more of the alliance's slack.

People have a really bad perception of classes in this game that's for sure. Either way, I'd take a dps on a class perform at 100% than the majority of players I get in towers that do 40% of their capacity on a job.