Keeping Mahomes in 11th round, Kelce Value?

This league is 10 team full point PPR and I am keeping Mahomes as my 11th round pick. I would love to pair him with Kelce but don’t know how far I should move him up the board. over tier 1 WR, over tier 2 WR, clearly not over tier 1 or 2 RB. Also it should be noted 8 RB’s will be kept who are tiers 1-3.