During my time I trade for danjou medal to trade for manyu in other tap.
Since I powering my first team so hard...
For now I still trade for danjou medal to trade for ticket in far future use, yes very FAR future.
Stock up some premium gift is good idea so I think it's ok to do.
I'm sure Roentgen and Myrdin will pass by with some advice (I'm also want that advice LOL)