You can change Gimmicks between Levels 1 and 7 once you have it. The current route has them at Level 7 at all times. Thing is, it may be faster to have them at Level 1. It's not much less damaging, and the Gimmick Microgames are shorter, which adds up quite a bit each time you use them. Maybe have most Gimmicks at Level 1 most of the time and only put the easy ones (or shorter ones) at a higher level at crucial times such as bosses. If this isn't necessarily faster, it can be used as a safety strategy, particularly when it comes to Gimmicks doing WAY less damage when you get them wrong, maintaining AWE Meters, and having them not be impossible when your Gimmicks get Janked.