Light pollution filter,Deep sky filter!?

[Supernova74]

Hi guys

My current filter collection consists of baader 2” moon Neodymium and skyglow IR cut ,and Exsplore scientific OIII filter which is a must on revealing the veil nebula and planetary nebula.my sky conditions are ok which is a class 6 bortale rating however due to less carbon monoxide feels closer to a 5 if that’s possible.i do understand that filters are not miracle cures and subtle differences are only noticed and mainly good seeing conditions is a must especially on galaxies as thay demand dark sky conditions and in the general whole of things I would say with my 12”meade ACF I’m managing to see 12th magnitude objects without to much trouble.I did purchase a while back a Exsplore scientific CLS filter and maybe i didn’t give it enough thorough testing before I decided to sell I was told by the supplier that the main purpose of this filter was to enhance structure on galaxies and clusters would be more apparent which to be honest reagarding the star clusters I found just made the image and transmission worse to dark!?.

so apart from the list above paragraph is there any other recommendations filters wise which yourselves have proven effective on visual observations regarding all things deep sky.