Not familiar with the engine but high compression engines like the Moki run better on FAI fuel, that's just methanol alcohol with 20% castor oil. Most shops stock 5% nitro and they also run well with that. 10% nitro they may or may not like that much nitro. A lot of the engines made in Europe were designed to run with just FAI fuel because of the cost of nitro there. MDS engines from Russia were a good example. Higher nitro isn't going to hurt it but it may not run well with it? All you can do is try it.
I had a number of the MDS engines, only one ran well with my normal 15% nitro and the rest I either mixed up my own FAI fuel or used 5%.