swapping characters in your teams

[Multibocks]

Ok so I want to see if someone can provide some feedback on swapping my characters around.

Team A:
paladin tank
dps shaman
dps shaman
dps shaman
dps shaman

Team B:
Warrior tank
arc mage
boomkin
destro lock
holy priest

What I want to do is swap one shaman to the Team B so I have a tremor totem (fear mobs in certain instances can wipe my group and I hate that.) Team A is all geared out and cant get any more upgrades until 3.3 (of course they can still PUG raid gear for upgrades). Team B is almost finished with heroic gearing and I want to do H ToC with them. I figure I could swap one shaman for either the lock or the boomkin.

Pros to TeamA:
Boomkin swap would give my shaman team Earth and Moon (13% more damage), at the cost of dps (really hard to manage eclipse procs) in losing a shaman. Team A would gain thorns and mark of the wild, nice bonus.
Lock swap would give Team A replenishment, also a 13% damage buff, a small health upgrade with pet and some healthy dps.

Pros to Team B:
Gain tremor totem and HERO (huge and will easily make up losing either lock or boomkin). Gain resists (again huge, I dont have cold resist, nature resist or fire resist.)

It's looking like I should send the Boomkin to Team A because they arent lacking in dps and while they could really use replenishment(destro lock,) my Team B would really suffer without it and I would probably have to respec my mage to frost to cover that. Any thoughts?