Which TE do I start in week 10?

Wow, you are on overload here. If you're weak elsewhere, try to trade one of these guys. In standard scoring over the last 4 weeks, these are the #1 (Reed) and #2 TE (yes, ahead of Gronk). You're leaving points on the bench.

Anyway, I'd go with Reed, because he's more consistent. He's not going to faceplant and if he can score up in NE, there's no telling what he can do at home in a dream matchup. Olsen has a tougher one, and is also less consistent.

Olsen against Tennessee, but it's close this week. The Saints have allowed the 6th most fantasy points to TEs and Tennessee has allowed the 13th most. Both are good match ups.