What's the best way to test GK performance in friendlies?

[RaiKo]

Are the goalie and other players separated in terms of power assignment and contribution? I mean, having more GKs in squad could cause spread performances in bad way? I've seen some teams prefer single GK in their squad.

[Polotoed]

I like having a second in reserve for those (plenty, Nordeus!) games that the GK decides to just lie on the grass and drink a cocktail instead of performing, so I can swap him out and he can get drunk on the bench.