06 RM250 fork setup

Hi, how's it goin! I can't help but find a solution because the fork on my bike is too stiff. And, the bottom out is too soft. I'm in the process of trying to improve this fork and would like to know what you guys think. I weigh 150 lb, MX, intermediate. How about using thiner oil in the cartridge, like 2.5 or 5w.

For the spring chamber, perhaps lowering the level some 20cc, and using thicker oil to help the bottom-out. Would this be a step in the right direction? Is Mobil1 0w30 still a good choice for the spring chamber?