remanz, agreed - having 1 healer with the 4 dk's is kinda like having no healer, just a taunting totem that works in pvp and heals itself. That's why I think you want a healer with instant cast spells that can help in the offense (priest or sham's dispels) or another DPS with some decent CC that's usable for a boxer.

the new talent death's advance - honestly I don't know what they were thinking. Unholy didn't really need a buff, the only reason frost was preferred by some (some... not all) was due to the massive AoE potential. Unholy is definitely the way to go for boxers now like mosg2 said.

Having a healer with the 4 rets might be a good idea because the rets could defiintely keep him alive during the initial assault. It'd work great with a disc priest provided he didn't oom as the match dragged on. The DK is not a necessary component of the team.

I'm definitely disappointed by the purge nerf, my 4 enh + war team will suffer. I don't really have time to play all 3 teams seriously, however, I'm having a very difficult time deciding which to play or if i should try to combine components from each.