my faceit peak was level 9 (~1920 elo iirc ) in 2017 and val peak was imm1
Altho i nvr rly played val that much and my pc is js bad - 60hz monitor and avg fps 50
Depends on person, but maybe like lvl 6-8, but some could struggle even in lower because CSGO works differently. Also many good Valorant players have experience from CSGO.
i dont play that much cs but i subbed in for my collegiate cs team once and we smashed a few level 9s, also my buddy is level 10 faceit and some high rank on ESEA and he hit imm3.