Only reason why I like the idea of 'top 5 people getting chests' is those people put effort in the battle field, and not just being there to leech, (of course if the WoE battle IS won).
It's not related to leeching at all. It's related to who abuses the system most.

There are points for curing, points for taking dmg, magic dmg, phy dmg, enfeebling, etc.

You can go rdm/nin melee, buff yourself, feed mobs tp, spam nukes and only look out for yourself and contribute 0 to the actual run (we've actually had rdms that made it harder w/ joytoy spam feeding it tp) and rank themselves a top chest.