As AJ pointed out, the key is whether they 1-gap or 2-gap. On running downs, whether lined-up in a 3-4 with Jones at 5-tech or lined-up in a 4-3 under, I would expect Kelly and Wilfork to two-gap, while Nink and Jones 1-gap. If Jones get sandwiched by a TE, he'll have Hightower at Sam to help him out. Jones has added 5-10 pounds, but he's still way undersized to 2-gap. If he were to 2-gap for a game, he'd lose the explosiveness that makes him so effective, simply from being worn down by much bigger linemen, who still typically outweigh him by 50 pounds.
Even were Armstead to show-up tomorrow, I still feel like we're thin at DT to help cover us, if Kelly or Wilfork are down for a game. I know it's wishful thinking, but I want Big Sey back.
Nink has played both Sam and DE. On the other hand, with Nink, Collins, and Hightower available and a thinner DL, I don't see Jones standing up much, if at all.