Once for 32, 34, 35 and get rewards. As many times as you want for 28. You can do the others as many as you want, just won't get the end of mission rewards.
English
-
Oh ok thanks
-
Think of the level 28 version as the "Strike playlist" version for it. However, the amount of times you open the Queen's chest at the end (the large one) is bound to how many Treasure Keys you have.