Weak Dungeon rewards.

Tonsafun

Considering how many dungeon matches get glitched out and how many teammates you get paired with suck, it takes way too long to collect points and the rewards are not worth the large time investment.

Etm34

If you have a very strong roster you can run map 7 and just beat dungeon 3 3 times to claim max rewards

Pach

They stack up over time especially on dungeon days
Go a few rounds with someone I ever the dungeon class cycle and you’ll get them