The recent Tengu crate rush is very good. Let me explain.

1) you have a very high chance of getting tengu

2) there are decent acoin rewards

3) if you save all your tokens for last minute you can do them all at once for the onyx crate rush

Tengu is not a very good mech but the 400 acoin reward in the crate rush is good 

Onyx is just OK but with the reward that come with it for 1st, 2nd, and 3rd place is good.

Thank you for reading my statagy.