TPW is amazing. I haven’t used it with ALiVE in great detail but definitely worth a shot (though I’d probably not use some of his features with ALiVE or Spyder Addons, such as ambient fighters, traffic, or civs).
I also almost always use Advanced Rappelling, Advanced Towing and Enhanced Movement (not really the kind of immersion I think you’re after though but good quality of life stuff).
i haven’t tried this yet but here is an undercover script made with ALiVE in mind: https://forums.bohemia.net/forums/topic/202256-release-incon-undercover-a-comprehensive-undercover-incognito-simulation/
And there’s this too which also had ALiVE integration in mind though I’m not sure how it turned out: http://steamcommunity.com/sharedfiles/filedetails/?id=1145478729