Flame Towers are among the best buffer-monsters in the game. Their HP is high, and both their magic defense and physical defense are high as well. They'll happily sit on the sideline getting Casting Support and Mindus up, and occasionally hitting you with Shinus. Now they're not incredibly powerful and you can easily beat them. It just might take a while depending on your level, If you fight one, you'll win; but it's up to you if it's worth your time. You can always flee if you just don't feel up to the fight. Like every Fire enemy, Water spells are going to do the trick although Gamble couldn't hurt.