Boss I can't kill

I'm having problems killing a boss. He has 6000, but I'm not sure if he heals after a failed attack. Any ideas of how many troops I should send against him? I've tried 3 times and each time get slapped back, lol. Help would be greatly appreciated. I only have the first 3 types of troops available.

A boss, if not killed, instantly heals after battle.
Some great guides here on the forums. Look at those and you will know how to beat this boss.

Thx will try to find them.