TB is becoming my favorite DG, i go pure fire for the most part, i did try putting points into that ice skill that lets you unlock fire and ice at lvl 15, the fire ball damage increase was awesome and with just decent gear i was hitting 1500 fire balls on everything, but im not sure if its worth all those points spent in that 1 ice line.
i also tried out a build where i max fire nove,fire circle AND get the cloak of flames for its on use ability..wanna see things burn down fast? try that out. save fire ball as the finisher while they are undoubtfully trying to run out of that aoe damage of ownage. that build also makes minion/reinforcements obsolete as they die in seconds. also with fire circle maxed out the mana boost it gives means you'll never pot again, i played a game VS nightmare AI with a friend (3v3) the game ended when i was lvl 17 and while inside the circle of fire, i had 23k mana(i also had all fathers ring,storm bringer, and i think 2 different helms), which was overkill as i couldnt even spend it fast enough to see the bar move more than a sliver. it leaves you open to stack more HP items and less mana items.
i kinda play more kamakahzi though, dont realy stack move speed items, i just run in. AOE like a mad man, which usually causes the enemy DG to run after 1 or 2 attacks when he see's his hp and reinforcements drop so fast. i also like staff of renewal for the cooldown bonus. the only bad thing i find about this style build is no interrupt/stun, so early on i find DG's scrolling out/potting through my attacks, but late game it becomes so strong that by time they realize they need to pot, its almost to late
