Many enemies in ranked battles ignore taunts when the party compisition doesn't support blocking it making tank type units useless. It is a major grind to get anything unlocked by shards and some units upgrades are RNG only on bronzium data cards which need a bulk open feature because the ally coins that you are supposed to be able to use on weekly shipments don't appear at or below level 73 and stockpile the cards need a mass purchase option even a 10x. text limits prevent me explaining further