donk the river or CR

[YanMTL]

3$-6$ game 6handed on pacific (no HH sorry)

A maniac (raise or reraise about 60% of the time) raise UTG, 3 folds and i 3bet with AJo in SB, BB fold, he caps and i call.

Flop KQT rainbow.

I C/R the flop, he 3bet and i capped it.

turn 6

i donk, he raise, i 3bet and he capped again

river 3, i have the nut.

Do you bet here or go for the C/R again?