In order to really unlock your accuracy potential, you need to fire a release using back tension. Back tension is an action, not a type of release aid. This method of triggering a release can be carried out using a number of different releases including index finger releases, thumb activated releases, and hinge releases.
In order to use an index finger release in the manner stated above, you will need a release that gives you a heavy trigger pull weight and very little creep. You need to be able to load weight onto that trigger and pull using back tension until the sear breaks and the release fires. The same basic principles apply to a thumb trigger and to some extent, a hinge.
Hinges and thumb releases can be and are incredibly accurate when used correctly. The same can be said for index finger releases as well though. The drawback to handheld releases however, is that they can be easily lost or dropped with the exception of the Scott Hex as was mentioned above. Index finger releases address that problem and are much more secure when strapped to your wrist.
Sorry for the long winded post, just trying to bring a different perspective. I would recommend an index release with a heavier trigger pull with little to no creep (Scott Rhino XT, TRU Ball Beast, or similar). I would not recommend a release with a trigger that a mouse fart would set off. That typically leads to bad habits and inconsistency. There are exceptions and some archers shoot them very well. Good luck in your search, I hope this helps sort through your options.
