@Prinzinc Troll has an advantage to draw the fight out. The troll can regenerate like crazy. So, he can afford to draw things out unless the enemies have magic flames that can actually damage them.
@Md. Anisul Islam That's assuming that the regeneration doesn't drain the troll's stamina too badly. If the goal is to win via attrition, forcing the troll to endlessly regenerate until it collapses is likely a solid tactic.