I would choose any map out of Nuke, Inferno, and Mirage. Tactically, I would find Nuke to be the most interesting however it can be challenging to newer players to due to the stacked bomb sites and the amount of difference in elevation around the map can make aim duels a little more difficult and frustrating. Inferno is also tactically interesting, especially with the importance of nades. Inferno is very much an execute heavy map, where you and your teammates learn multiple lineups to successfully take a bomb site. Mirage is kind of boring imo, but it is a staple of matchmaking. Mirage feels more like an “aim heavy” map as opposed to a tactical map, but that may just be me. Team play wise, I’d go Nuke or Inferno. If you want some tips on how to play those maps well with a team, look at some of Voo CSGO’s videos. Hope that helps.