Thats alot of training. Wish I could get in and do BJJ that much. I hope it keeps going well for you.
As far as extra conditioning if you are not gassing on the mat perhaps just leave it out. With that much rolling you should be getting plenty of sports specific conditioning.
If you wanted to do additional strength work perhaps take a look at Dan John's blog or Wendlers 5-3-1? I know they have some templates for two day a week training. Something low volume like 3 x 3, 2 x 5, 5 x 2 perhaps. Pick one push, pull, squat, and posterior chain movement. Keep the intensity high enough to at least maintain strength but not so high that you are fried for grappling. If you are doing this two days a week maybe do different movements for the second day.
Just my thoughts. I thought about a similar program for myself but in the end concluded that I need to work on my condtioning more as I am gassing when rolling. Perhaps I will emphasize strength later down the line.
Let us know how it goes.