I don't care who they were before joining Astralis. Right now (since 2018) they're world class aimers, all 5 of them.
Most teams had at one time 4 world class aimers be Na'vi, French super teams, Faze, Mibr, etc but not 5. The only 2 teams to actually have 5 world class aimers are liquid and astralis. This is not my opinion, it's a fact.