It looks like you're new here. If you want to get involved, click one of these buttons!
Since humans respond better to positive reinforcement, please consider the following.
Create a new stat. Call it "synergy." Over time, this goes up as a player generates aggro (by healing, CC, dps, taunt). At certain thresholds, the player's power increases or perhaps gets special finishing moves or whatnot. Death or logging off resets the value to zero.
Ok cool, that's on an individual basis.
Now, for groups, add a new stat called "group synergy." This will be the sum of all group member's synergies. And higher group synergy brings with it significan benefits.
Now we have a pretty powerful incentive to avoid death of ourselves and group mates; while at the same time not burdening people with xp loss or xp debt.
/edit. You know, the benefits could be as simple as xp bonuses.
/edit. Re death penalties. They don't really exist in today's MMOs. I personally miss them but would welcome the alternative mentioned above.
Luckily, i don't need you to like me to enjoy video games. -nariusseldon.
In F2P I think it's more a case of the game's trying to play the player's. -laserit