That's well and good, but as a long time PvPer and avid fan of 'perma-red' servers (Yes, I do play on the PVP servers here too - as destro, IMAGINE THAT and order is ragtag there too) I heartily suggest faster strategies. People in large groups have a tendency to stray, and for each stray there's a stronger chance of someone following them. We had too many that did not follow the plan, even in guild run warbands which resulted in a wipe. Two actually.
The faster you get in a position of power, the better off you will be. If everyone would listen and healers weren't getting focus trained it would be a great plan. Right now we do NOT have focus trains going, which is serious problem. Sadly, it takes a lot of work to teach a large group how to PvP effectively and the difference in playstyles needed between small ORvR skirmishes, scenarios, keep defense, and keep offense.
There's a LOT to be said for a fast moving, highly DPS/focus fire oriented, group that has strong unit cohesion. I've seen this proven repeatedly, both giving and receiving. If we have one band of "hit em where it counts or die trying" and another more "stay topped up on health and keep pounding" group there's going to be a lot of carnage on the field.
I can go into further detail later, but I do have quite a few tricks up my sleeve for large scale PvP.