I need to get accel but I need a fast way how, atleast within 3 days I can get.

Something that would maybe boost your character would be good.

I just did my first run, me and my team of randoms (was not a purposely speed run but decided to record it because I had nothing else to do today) beat Fallen in 20 minutes. We apparently are the first to do 4 player without event towers on rocket arena.