Said - first, I encourage you to check out the Timing Methods on the FAQ wiki I set up:
mechinvesting.wikidot.com: Home - MechanicalInvestingFAQ
specifically - mechinvesting.wikidot.com - Timing methods

Some details on my other signals I follow, mostly posited years ago starting when the BearCatchers got developed:

FlyingCircus writes on Market / GTAA Indicators end December '23
Putting it together - FlyingCircus replies on Question to MI board, 99-day rule.
Additional context: FlyingCircus replies on Question to MI board, 99-day rule.
You're right on DBE/99d being slow, but understand it was designed for defense - to reduce losses in long (and slower developing) bear markets, not increase CAGR. FlyingCircus replies on BCC III, an update from 2013

And the benefit of these other signals beyond playing defense (allocation to equities) is limited at the macro level, as I mentioned in this post last fall:
With the exception of the extremes; the most pessimistic negative environments have recently been a great contrarian "buy" opportunity, and the most optimistic positive go environments have recently been a good equity exposure reduction / take some "off the table" opportunity.

So understand what I'm pointing you toward are some pretty noisy tuning knobs, or blunt instruments - just for reference & your choice-making - and all to be used in concert, not individually.

FC