Mirage, haven, ascent, overpass, inferno
mirage is worst map for, some guys just play only mirage, go play some less popular maps that you will manage to learn a become better on it than most on players, thats my faceit lvl 3 opinion
I would pick inferno first, because you can isolate duels much easy.
For me nuke is good as soloq player if my teammates stay alive more like 20 seconds.
Inferno. On t side if you get the first few opening kills and your team ain’t rtards you can win easy. Is annoying on ct though when u got a guy playing apps or mid that dies almost instantly and u play most of the game 5v4
VTG cuz people are clueless
Ancient (A site hoping my team is able to hold B)
Vertigo (A site)
Imo Mirage, Dust2 and Inferno since those are all maps that everyone knows quite well (you don't really have games there were you play with people who have no idea what to do against people who know the map very well like you can have on maps like Overpass, Nuke, Vertigo etc.), those maps are not really teamwork heavy and are very individualistic and those are really simple maps to play too.
mirage, vertigo and d2. for example u can win the game by abusing vertigo b because u can take the site alone
Overpass (T side is a bit harder but u can just abuse awp as CT)
1. vertigo (the most solo hard carry ultra mega impact map)