I had the same experience. Finally got a high elevation pass and when I went to use it on the last tier it now says only a champion in that slot. I used a player in a previous upgrade so I was able to downgrade, use the pass in the middle upgrade spot and then re-use the player in the last upgrade spot.
I had the same experience. Finally got a high elevation pass and when I went to use it on the last tier it now says only a champion in that slot. I used a player in a previous upgrade so I was able to downgrade, use the pass in the middle upgrade spot and then re-use the player in the last upgrade spot.