t2a arena definitely needs to happen. Not sure about t5b. Maybe 1/4 t5b arena every 2 weeks and a t2a arena every 10 days. If you could get a t5b every week and a t2a every week, you would overflow with t5b faster than you could use it (because the lack of t2a).
That said, i could see a new 2mil milestone for the alpha arena that gave 12000 t2a shards. 3 arenas, or 27 days, for 1 full t2a.
That seems unlikely to me. Speaking as someone that virtually always maxes that arena to stock up on T1A that's a relatively huge reward for relatively little effort.
Comments
Make one arena every Sunday for t5bc and t2a shards.
Add in 5* basic arena.
Update the T4B arena to be a T5B arena that includes the 2 full T4Bs along with T5B shards at maximum milestone.
These updates should keep higher players playing arenas, without adding extra arenas.
That said, i could see a new 2mil milestone for the alpha arena that gave 12000 t2a shards. 3 arenas, or 27 days, for 1 full t2a.
(I also feel 100% UC + master EQ should give enough shards to give a full t2a, instead of the less than half we currently get)
I could see a new 2.5mil milestone for the basic arena that gave 3000 t5b shards. 3 arenas, or 27 days, for 9k shards, same as 100% UC.
Finally, a new 3mil milestone for the class arena that gives a full t4cc.
That seems unlikely to me. Speaking as someone that virtually always maxes that arena to stock up on T1A that's a relatively huge reward for relatively little effort.
Or make it 3 days then 5M for 9600 shards and last at 6M for 12,000 shards.