Support
-receive a bonus for healing a player who was near death (%?)
--receive a bonus for healing this player to max
--receive a bonus for overhealing this player to max
--receive a bonus for armoring this player at all (scale?)
--receive a consolation bonus for healing a player who was near death but was recently healed to max

Tank
-receive a bonus for remaining in an area for an amount of time without dying (periodic/continuous? scale?)
--receive a bonus for damaging/killing enemies after staying in this area after an amount of time

-receive a bonus for other players receiving damage bonuses while enemy(s) threat value(s) for the tank are above base value (single/multiple?)
--?bonus disabled if another player's threat value(s) for an enemy(s) exceeds the tank's highest threat value for any enemy [mull]