Against a whale I'm betting all 3 streets with an over pair.
If your beat your beat but I think the majority of the time your ahead.
I don't over analyse these situations against whales but that's just ne

Checking the turn seems like a spot we're giving up a lot of money. Like above I would have bet 3 streets.

As played river is a turbo fold for me, 4x the pot and the guy is playing 89/4, he pretty much always has at least 3-of-a-kind here.

I'd just try to go bet bet bet on this board. An overpair vs an 89/4 is basically the nuts. Against this type of player I would also increase my betsize so I'd go maybe 9 on the flop.

I'm a pretty big calling station and I guarantee I call river a non-zero amount of the time but it's probably a fold if you haven't seen him do anything like that before. If he's done this a couple times already while you're been at the table then snapcall and enjoy your dollars.

Yep ok, thanks guys, maybe I should embrace the variance a little more.

You need to embrace the value!
Just for fun I opened up flopzilla and though he hasn't played every hand I'm going to assume he has 100% of hands minus big pairs (since he's raised before in your sample) in his preflop range (that probably works against you since he'll have more 2x).

Against that entire range you have 79% on the flop, 82% on the turn.
If we assume he calls flop with any pair or better plus hands with 2 overcards which I think is reasonable for such a player you have 65% on the flop, 70% on the turn.
If we assume he only calls with pairs and better plus draws on the flop you have 58% on the flop and 59% on the turn.

In all cases you're doing great and that's even with EVERY SINGLE 2x possible in his range. Add to that the value you get with your fold equity any time he dumps a hand and it's a great situation to be in.

tl;dr: overpairs are the nuts

Sigh, it must be fun to be good at this.

Thanks again guys.