$5/$10 Set River Decision (Hand reading related)

[NYWalker]

Live $5/$10 NL in LA cardrooms. Villain is very loose aggressive.
1. He always 5.5Bet preflop from LP against live straddle with 3 limpers.
2. He always bet on the draw and raise with combo draws in HU.
3. I have tight image. Earlier hand, he's the button. utg live straddle $20, MP+1 calls, I call with JJ from LP, villain 5.5bet to $110. Live straddle calls, MP+1 folds, I raise to $510 (with $1K behind), he folds.
4. He also folds another hand pf to my limp 3-bet. But we never play post flop.

5. He's very lucky and covers everyone at the table, so he likes to call down in HU.

This hand, mp limps, I limp with 66 from mp+1. Folds to villain, he raises to $60. mp folds. I call. HU.

He has 5K, I have 2K.

Flop 762r. He leads out $100. I raise to $200. He calls.

Turn Kd, two diamonds on board now. He checks, I bet $300. He calls.

River Td. He checks, I?

Plan A, (aggressive) under bet the river $200 - $250 to invite a shove from weaker hands... (Read - he'd c/r the turn if he has combo draw, but he cc the turn. I don't believe the river help him. His hand has no showdown value, my underbet shows weakness and invite a shove from weaker hand, call from medicore hands.)

Plan B, standard, check behind.