If he hasn't had ketones in the past, there's no special reason to test him tonight. I just ask because if he had had ketones, we'd work a little harder to get some insulin into him. As it is, that is less urgent, and you should just keep doing what you are doing by testing for ketones regularly.
As for what to do going forward... I mentioned the yellow "stickies" about the two dosing methods we use here. Under one of them, SLGS, Djoko has earned a reduction with that 86 (4.8). If you follow that method, your new dose going forward would be 1.25U.
If you shoot tonight, you should get at least a +2 to see where he's headed. I do expect him to go high after that lovely green number

, but just in case he doesn't you need to be prepared to monitor. I won't be around for the evening cycle, but hopefully others will be able to step in if you need assistance with that.