if you dont have very many pots. stick to the 151-300 rewards and keep farming pots. if you aim for high midterm and high final rankings, you'll never have enough pots for when a card you like comes out. don't try to get high placements every event is what i'm trying to say. save up and aim for the events that are going to help you.
so many people are spending way too many pots on this card and it's not even good. the top 10 are in the multi millions. i can only just imagine how many pots they spent to inflate their rank. i always aim for the low part of the rankings. there is no prize difference from 1st place and 50th place, but the amount of pot difference used is tremendous.
take it from me. yeah, i can place top 50 probably for a few tower events in a row, but if i don't need the cards, it's just a waste. when the cards i do like or need come around, that's when i'm going all out.