hand

No stats, unknown opponents.
Q1: As my range has few sets and no nutflushdraws, I 3b TT and 55, aswell as Axs. Should I have a XR range here, is TPTK ( I do have ATo) and my set of 22 candidates for making a XR range, what bluffs should I add to it. I have decent amount of gs and 3 to str8.
Q2: As played, his XB range is not favoured by the 5. Now my range has set, TPTP, Tx, some 5x can I lead here, because I rarely get raised? Sizing?
Q3. Would you bet river on a 8 or 7?