I entered a "3 CLUB CHALLENGE" at my club once (please note that is singular).
I took out a 1 iron, a 7 iron and a PW.
I didn't do great, I didn't do sh!t but I was summarily DQ'd for "not using a putter!" by some officious little tw*t of a committee/games & handicap committee member.
When I expressed I'd only used 3 clubs and as that was what it said on the tin...
"EVERYONE *KNOWS* YOU SHOULD USE A PUTTER!!!"
"Er, well obviously not everyone and no one said anything on the 1st tee, or during my round for that matter?"
Anyway the upshot was a torn up card thrown in tw*tty's face. That cost me a 3wk ban but was a source of great amusement to the club Sec - who could've bannished me!
So take what you like, I don't care!!!
P.S. FWIW I think your original line up pengwyn is spot-on.