Here's a list of tweaks and sources that are good for iOS 9.3.3, I haven't had any crashing or booting in safe mode issues after refining the list.
I recommend getting Flame first then copying the sources section, then go to
Sources>Edit>Add>Batch Mode>Yes
Without further ado, here is my setup!
(Click like and thanks at bottom of my post to unlock content)
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Sources:
Tweaks:
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Of course this is just a handful of tweaks, you can add and remove to your liking, these are just what's on my iPad, (not guaranteed to work on iPhones)
Again, please like if you enjoyed and thank if possible.