Heading back to the original idea, your party is pretty well balanced. Hunters for dps, and a druid for healing. Master Tactition would work well for your hunters, and maybe be somewhat helpfull for your druid getting into place, but his crit does not really take advantage of the instant crit move unless he is involved in a very specific action combo, which would require a great deal of accurate timing.
Additionally, as aformentioned, Vi'gor lacks substantial damage output, which means your party is mostly specialized in producing physical damage, which would run into serious altercations when versing a party of high defense paladins that can easily heal themselves. Also, there is no way for your party to mitigate damage aside from the fact of having the pets. Elanna fares well in ranged combat, but when heavy melee hitters start to concentrate on her, this party cannot force a pet or even Vi'gor to absorb the impact and keep Elanna protected for continuous shots. For this, I would suggest having at least one Elanna with Old Bones and/or maybe replacing Cat Form with Bear Form.
Unless you mean Tranquility, which is the one tick, channel healing ability, Rejuvination is a restoration buff that heals one ally two health on ticks 5/10. This would be a good card for this party if there were some way to ready it again in the same round. Rejuvination would work well on Vi'gor, since he is a pretty tough character, but since it can only be cast on an individual miniature, only one Elanna can get it, therefore the enemy would concentrate his/her attacks on the non-buffed one. On the other hand, were you to include Tranquility, that would mean the party would have to remain stationary in order for maximum healing to occer. This means that enemies can close the range between themselves and the hunters, which is not good for Elanna.
Essentially, as with most parties, this one has some flaws. However, luck is always an ally when she chooses you over your opponent. After all, if you are lucky enough to roll five damage with both Elannas, or pretty close to that, you are doing a total of about ten damage per turn, and if concentrated on one enemy, chances are they will not last very long. Additionally, this party would probably fare really well against low armor parties, since such large amouts of physical attacks would ravage one armor minis. Along with that, this party's resist is not so terrible against average magical attacks.