Spent 2 hours on these guys last night and just couldn't get them all down. We tried various tactics including all of the above. We managed to get the druid, pala and priest down, but for some reason we seemed to take massive casualties after that every time so still working on a tactic.
Actually ignore the bright spark's tactic. Killing the healer is purely a cleaveteam arena player method. Be smart
Holy pally - bubbles low hp targets - dispel
casts Holy light - interrupt
casts Flash of light - ignore or stun
Priest - uses renew - dispel his target
casts flash heal - interrupt if possible
Shammy - heroism - mass dispel
healing stream totem - totemstomp asap
lesser healing waves - stun and interrupt as much as you can
earth shield - dispel asap
Druid - banishable/cyclone is best used on him in chains,his healing isnt immense but can get irritating
If your people start chain dying 2-3 mobs in it's possible their dps is getting too much free time to go rampage. Take out the War/Ret pally
Rogue shadowsteps too much to be viably dpsed early on
Hunter does alot of dmg so taking him early on can also help,tho he tends to move around alot aswell
1dps/1healer/1dps/1healer/dps/dps/dps tends to work best with the harder comps