well, you're close, there are only 5 floors on this tower.
1. You should have 3 potions, make sure to fill them all up.
2. Try to strategically heal at the end of each round. Not sure what kind of healing spells you're packing, but a nicely timed satyr towards the end of the round goes a long ways.
3. The levels are fire/fire, fire/death, fire/fire, balance/balance, death/death so take the time to set your shields accordingly before each battle.
The good/bad news is that you'll have plenty of time to practice tower strategy since there are about a dozen towers total in dragonspyre. I'd be glad to help if you post a date/time (with timezone)/realm/area. I've solo'd most of the towers in DS with my fire wizard.
does anyone have tips for beating the tower of war in the plaza of conquests? i have tried many times (even with a Lvl 50 ice wizard) and couldn't get past the 5th floor. please help me!