With the help from junhe and WhiteFalcon. Here's a new respawn ticket plugin which will not make the boss max health too high to defeat and a smart way to reward your donators. When a player use a respawn ticket boss will restore the damage they dealt. If player has dealt 0 damage boss will gain 7% rage charge.
It shows a menu when player died. Player can use their respawn ticket anytime after death.
You might want to use override. Command
sm_spawn - use a respawn ticket.
respawn_playersleft - When the number of players alive is less than this, players are not allowed to respawn, 0 to disable.
respawn_toomuchdamage - 1 - Don't allow player to respawn when their damage reach the ragedamage. 0 - Disable.
Put the .smx to sourcemod/plugins
There's no need to rename it to .ff2
1.0 - Initial release
1.1 - Delete some include files and fix a formatting error.