Need Help getting out of ascendant.

i peaked ascendant 3 46rr after rank reset (i was previously diamond 2). But ever since I've fallen quite a bit and am sitting at ascendant 2 rn. I'm gonna have the most free time during this act so I wanna make the most out of it and SOMEHOW GET TO IMMORTAL

I have a postitive KD 90% of the games and mainly play raze and clove. My MMR is kinda fucked because even a 13-2 win with 32 kills only rewarded me 19rr but losing even a close game deducts 21rr.

Need some useful advice to get to immortal