Simple Temple Fix.

Divide Locks into 3 teirs.


Top teir locks a room permanently.
Make it as rare as needed to make it take half the league to make a crazy long permanent snake.

Mid teir locks a room for 10 runs it last long enough you can get a snake somewhat going but it will eventually start to degrade without some luck.

Low tier locks a room for 1 turn make it fairly common so you can try to keep you best stuff often emough to get somthing going if you dont get unlucky.