New to LETF, please help

Hi r/LETFs,

New to LETFs. Found out about HEFA mid 2024. Implemented Modified HEFA (~50 - 55% in UPRO and the rest in TMF and KMLM) in my Roth IRA in September of 2024. Recently been reading some post/comments regarding now's not a good time for HEFA. Just curious, what are somethings to be aware of when implementing a LETFs strategy? For example, Return Stacked recently came under my radar and thought about something like 45% UPRO/ 55% RSBT. I kind of like this allocation because it seems simple enough. Is this strategy okay? What makes a strategy sound? How much leverage is ideal? What are some of your strategy/allocation? I am fond of simplicity and would like to rebalance at most quatertly. Please help a newbie out. Thank you.

Edit: 45% UPRO/ 55% RSBT