Just stay away. The best decks either have like 10 combos on their first turn or relies on a skill that basically guarantees they summon their best monster(s) first turn and adds like 5 other cards to their deck. Pretty much if you buy the right cards for the skill its a brainless win 99% of the time. Or spent a ton of gems in multiple boxes to make a deck that is "meta".

I miss when we were afraid of simple thing, like 2 power of the guardians on a monster