In the current system, when you deploy a team for the weekly alliance sparkle tournament pvp event, changing gear for dungeons / goblin / vortex will strip the champions you have set up for the alliance fight. I suggest making these champions share the same gear you use in arena, that way you aren't accidentally stripping gear from your defense teams whenever you want to run a dungeon.
Also, there is no clarity about how this actually works. After the sparkle tournament starts, is the gear locked in or does it still change after the battle starts? I'd love to know, because current system is difficult to use and ends up with a lot of the deployed teams having no gear on them because people forget to equip them or end up running dungeons / goblin / vortex before reset and stripping the gear off.