Lemme say a big NOPE.
Rusher already has the reward, they will fight vs many more bosses than the slow player who clears every room.
That is the reward for rushing. They get the thing done faster (as well as the fun/thrill/etc) so they over time will have much more loot naturally.
It will also result in every dungeon being like OT where 99% sit and wait for the rusher because if you can’t compete in the rush why bother even moving.
And the meta will also become:
people join as trickster or planerogue, teleport to the actual rusher 2 rooms before the boss, TP the rest of the way and get the credit where nothing is earned other than exploiting the system to thinking they “won” the race somehow.