Fire->Ice: Weapon dmg increase (~80 I beleive)

Ice->Fire: +50% mana regen.

This is interesting because I've seen quite a few people saying you should stay with one side as a primary and I tend to agree.  I've played most of the classes but found TB to be the most fun on the battle field.  (OK Sniping runners across the map with Regulus is fun but also annoying to the teammates.) 

While testing different builds, the delay flipping from Ice to Fire was getting me killed and lowering the overall damage potential.  Even TB's regular shots are worth a few hundred and you miss a shot or two ever time you switch.  I suppose you could say it all depends on your teammates.  I've played a few games where player choices leave you as a primary AOE damage and in some cases ranged damage dealer forcing a fire build, and a few where there is so much firepower on the team anything but Ice is overkill.

I'm interested to know how many people play with balanced builds and how they end up.  I've always had the flip delay cause issues and deaths.  The frost nova gives you just enough time to flip to fire but you miss your chance to do damage...

-AceQ

The Problem I have with TB right now, is that some of his abilities seem redundent. He's got so many types of AoE when it usually only  takes one to clear out a creep wave. I've been trying to utilize his stance switching bonuses trying Fire/Ice builds.

I'll get max Fireball and Deep Freeze to get Fire and Ice, and then I'll get Rain of ice, because at max level that'll give me 2 ice debuffs to Deep Freeze at max level. But My second fire abiltiy I'm not sure about. Ring of Fire or Fire Nova? What's better when?

It seems that going from Ice to Fire = about 1 sec delay.. and fire to ice= 0.3 sec delay (This is from experience).  You guy can jump in if I am wrong of course.

So.. if this is the case, it is better to cause some heavy damage using fire.. switch quickly to ice and use the extra slowdowns ice provides plus the extra weapon damage.

It's been my experience that circle's damage is a little too slow to take great effect, as people are unlikely to stand in the middle of it for long.... Unless you end the fire combo with it, switch to ice, and nova! The extra damage while they're trapped, burning in the nova is pretty solid, and I'd always go nova before Rain of Ice, as Rain seems to have virtually 0 cast time (if any, I can't remember and can't access demi right now), as well as a longer range. So if you dip into circle, bearing in mind this will lower the effectiveness of other skills...

Fireball -> Fire Nova -> Circle of Fire -> (change form) Frost Nova -> Rain of Ice -> Deep Freeze

As Teseer said earlier, yes, you get buff when you switch form, and for 20 seconds (meaning you can have both at the same time)