If the dag fail to verify try -K 1 (--dagintensity 1). Did you try the v1.43 build yet? I have added 7 cuda kernels that could work better on lower TDP settings (power).
--kernel can now take a value from 0 to 15
But run it in autotune mode first and check the results
I use dag intensity 1 , on all rigs in test , but on rigs with 12x3070 and 12x3060ti it is unstable , maby you must do it option maximum slowly for rtx 30xx series, or do option dag repair, like LoL miner . if you do this , I can test it on all my rigs , I have above 6 gas. Then I posted result to the other user , I think it can help many people , who want use you miner .