i’m more afraid of archon than of phoenix with mutalisks.
because phoenix need micro need to trade well
if there are not too many of them you can catch some phoenixes with forward backward.
with archon i know that if toss now crosses the map i am dead because the mutas are useless in a fight. and the mutas cost me many resources (if you go to mutas too early).
similar to bio-T. too early mutas => t builds 3-4 turret and makes a counter attack and mutas again useless vs bio.
But like I said this is a problem if you go on mutas too early.
generally mixed feelings about mutas.