What combo are you going for?
Personally deciding whether 2 t2A is worth sacrificing the six star shards. Thinking of going for set 2 rankup and set 1 shard to avoid the t5B(under lvl60 player already capped on t5B), but then I'll have to be content with a thousand less 6* shards, which personally isn't the biggest deal for me. Anyway, let me know what you think, the poll is just there cause why not