Best Med Resolution for PPSSPP

[sixthday6]

Hello there, firstly I want to list down my specs.

(just tell me if you need more details!)
Core i7-7500 (2.70GHz)
Nvidia Geforce 920MX

I tried playing God of War and it isn't a good result even though I have a pretty good specs, btw im using laptop. The sound is choppy but the gameplay is doing fine just some lags.

I tried searching for some best settings and actually got here, I applied the settings written down on a topic posted here, but it became more laggy and the fps went down to like 15fps/30 (i refrained it from going more than 60fps).

Please give me the best settings for my laptop and PPSSPP, not only for playing GOW but also playing other games!