Just did it with my team. For a long time I let my shaman team lag, got a mixed team to 80 then quit due to crunch time at work for about 6 months. Jumped back in and leveled my shaman team up, 2 of the 4 hit 80 just the other day and the others are 20% of 79 left to go. I got lucky and every ring that dropped was a caster ring so now they all have the hit ring and one has the hit and mp5 ring.

Knowing my lucky streak though tomorrow I'll get nothing but the same dps ring.