With regards to night nappies it may be that you now need a dedicated night nappy like a bedbug or a weenotions night notions or similar...I can use a boosted goodmama at night time under wool but 99.9% of the time i use a weenotions night notions.
As for the swaddlebees that leak...do you add any boosting to it? Is it the pocket or a fitted?
Flexitots i found pretty useless tbh on my son who really isnt a heavy wetter at all...
I would try boosting everything, play with combos and see what works