Well, 4 shamans isn't just to 'be' like Ellay, kudos to Ellay for being successful, but it's not like he invented winning on his own and therefor is the only one worthy .

To me it seems 4 is a nice number to multibox and always leaves room for a friend, whilest at the same time being set on arena as it's simply better with a second mind on a healer there.

Whilest playing with 5 will limit the ability to party with a friend, in pve most of all, in PvP to the point of having to resort to rotations and such.. I fear that might be boring in time. Playing entirely solo is cool when you venture into new content. But after 2 or 3 times, I reckon you've had enough from that part/instance.

Mmh, the more I think about it, the more I'm edging towards just keeping 4 myself.. That should offer a more dynamically environment that won't bore as quickly I think.