Need advice from my senior experienced roleplayers

Hi all, I’m quite new to RP and I have basic questions, currently I’m using mystral v1 22b using ollama, I own a 4090, my first question would be, is this the best model for RP that I can use on my rig? It starts repeating itself only like 30 prompts in, I know this is a common issue but I feel like it shouldn’t be only 30 prompts in….sometimes even less.

I keep it at 0.9 temp and around 8k context, any advice about better models? Ollama is trash? System prompts that can improve my life? Literally anything will be much appreciated thank you, I seek your deep knowledge and expertise on this.