Pg-rubio
sg-monta
Sf-melo
Pf-ibaka
What do you think of the knicks
I like this group a lot. In the past, I shared the same thoughts as a few others have mentioned that I just don't see Monta being a championship type player. I thought that for a while until about a year ago when I thought of what an amazing 6th man he'd be! Think Jason Terry x 2.
With Rubio, Melo, and hopefully a couple other capable players, you may have plenty of offense in your starting lineup already. Rubio can make your next two players better than they are if you choose the right players. Then, bring Monta off the bench as a backup 1/2 for 30-35mpg. You've got two great options for a few minutes, then an explosive go-to scorer in Monta when Melo is on the bench.
With Rubio playing an up-tempo game that Melo would actually be very good at (from what I've seen in Team USA), I'd be very intrigued if you could trade Ibaka for a taller defensive C, move Melo to PF, then draft some gunners on the wings. And have Monta Ellis off the bench. You'd struggle defending against the bigger PF/C combos, but I'd just advise you to counter with "who of those frontcourt players is going to guard Melo behind the arc?" and insist that he will torch them for 35 (maybe 40?) points easily. (Side note: Carmelo is a much better 3 pt shooter than his career % indicates. He has either forced up himself or been forced to take a lot of contested shots against opponents' best wing defenders while teammates stand and watch for most of his career.)