Omega Raid que..

[RyuujinZERO]

Their queue algorithm already does this OP. The reason you are sat in a queue so long is that there aren't enough healers and tanks to go around. All of the DPS 'parties' awaiting a tank and healer are in a queue based on first-come, first-served, and as tanks and healers become available they will be assigned to the next in queue. The reason the queues seem so short for tanks and healers is that they are the missing person, once they join the party is ready to go.