Brann XP in delves by tier?

[Sendryn-sentinels]

Keep in mind when testing this out:

@Kaivax

At level 15 and higher, Brann only gets XP for seasonal progression from bountiful delves.

We have a hotfix coming that will make this more clear in the tooltip. From level 1 to 14, Brann gains XP from all delves, and then from level 15 to 60, the tooltip will read:

 Complete bountiful delves to increase Brann's power in combat during the season.