Help! How often to BD during fertile week w/low motility?

Can anyone help? For the last 10 cycles since my husband’s vasectomy reversal we’ve had sex like rabbits during my fertile week lol. Obviously that didn’t work & we found out my husband has low counts, especially low motility. We are waiting on another semen analysis in Feb before deciding to move forward with iui or ivf. Trying 2 more cycles naturally in the meantime. He’s on a ton of vitamins.

Just entering my fertile week & my question is: what are the best days to bd in our situation? Every other day, every 3 days? I’m afraid the SMEP plan is too much. Would am day before ov & pm day of ov still be too much? Uugh! Help! Any of you get your bfp naturally with low motility? Thanks ladies!!