You're likely looking at at least $11.5M for 34, especially if the cap goes up as much as predicted. If we could get him to sign for $11M, I'd be happy. I don't think either 16/29 are making $8M, but I can see both signing 8x7.5, which doesn't change your combined salary for them.
Basically, I think we need to budget about $27M for the 3 of them and go from there. If they take discounts, fantastic! For comparison sake, Edmonton is paying McDavid/Drai/Lucic $27M combined, with another $6M for RNH, who is signed for 3 more years. If we can go with Matthews/Marner/Nylander/Marleau at only $250k more for one season, we're in a great position.