bluffing the river at microstakes

[kickass]

first hand in a while, villain is pretty tight but only a couple of orbits i don't remember his exact stats at the time.
open seems standard as does c bet. my range for betting this turn is pretty strong a bunch of kings sets including 3s as id prolly bet this flop with my entire range 2 pair and then 57s 79s and mebbe T7s.
River; if i chose to be balanced on this river and not bet only for value, i have 12 possible bluff combos and id value bet all Kx from AKs-K2s and AK-K9o and boats and quads. i prolly chk back AA and 86s. does this look right? or should i be checking some of the weaker kings too?
if villain has a hand weaker than a king he can not bluff catch profitably vs this range. if i bet half pot he doesn't have the equity to call with A8s or TT. he has roughly 19% vs my range.
have i missed anything?

$0.02/$0.05 No Limit Holdem
PokerStars
4 Players
Hand Conversion Powered by WeakTight Poker Hand History Converter

Stacks:
CO ($9.08) 182bb
BTN Hero ($5) 100bb
SB ($5.12) 102bb
BB ($5.14) 103bb

Pre-Flop: (0.07, 4 players) Hero is BTN
1 fold, Hero raises to $0.10, SB calls $0.08, 1 fold
Flop: ($0.25, 2 players)

SB checks, Hero bets $0.16, SB calls $0.16

Turn: ($0.57, 2)
SB checks, Hero bets $0.38, SB calls $0.38
River: ($1.33, 2)

SB checks, Hero $4.36