Talk:Underworld Tower to Heaven/@comment-198.48.173.195-20170806014329/@comment-32317026-20170806100503

I can't speak for Ex, but in adv the amount of RNG is ok. The problem is after you've reached 90k. The next decent floor reward is at 150k, which is unreachable for a f2p adv player, so there's not much reason to continue grinding other than ranking. But since you're likely to end in T3000 if you've reached 90k floors and unlikely to end up in T1000 with less than 150k, that's not a very good reason to continue grinding as well.

So like Ikikinoko said, the event is basically over after you've reached 90k and you're out of crystals.