What c-bet size would you make?
As I said, it doesn't actually matter too much given the SPR. If hero decides to use a small sizing then it should be
very small though, since the main reason to bet small is to very occasionally have villain spazz out and jam a hand like QQJJ because he thinks hero might fold. But this is not going to happen much of course. Against villain's KQJ9 or 6789 type hands it does not really matter whether we bet small or just pot, since villain is not folding and we are likely going to be all-in on the right side of a 60/40 race - unless villain has a pair in his hand obviously.
However potting it might actually be the best play in a tournament, even though it feels weird. Since villain's ~40% equity with 6789 or KQJ9 (or whatever) is right around the break-even equity for him to get all-in (we have a little more than pot left in effective stacks), we do not mind too much from a chip EV perspective whether he calls or folds. And since there are 'tournament life' considerations, hero might want to choose the line that generates the most folds. I don't think it is very likely that villain will fold a Kxxx hand or a 8xxx hand to a pot cbet. But he might do, people do sometimes overfold, and we kinda want him to.
Hero having TT in his hand is kind of nice though since it is sometimes going to be a blocker for villain hitting two pairs - if villain gets all-in with KQJT or 789T etc. And when this is the case we are ofc going to be better than 60/40. Which argues against just potting it, since we do not want villain to fold any of his hands that contain a T (or an Ace ldo).
But, like I said, it does not really matter too much what bet sizing strategy hero uses... as long as he does not fold lol!