Legendary to hold stack/cannalization after switch floor

When we change GR map (floor one, to two, to three, to four) we lost our stack/canalization. Because it delays to load the next map.

So to solve this. It’s a support issue. Create a legendary power to follower benefit us example:

Power: When player change floor the stack/canalization hold up 5 seconds more. (this bonus could be a bonus from 2 pieces set item from follower too).

We already have bracer on follower which helps a lot. I just don’t know which gear kind this item could be. Any idea folks ? Belt or follower helmet maybe ?