You guys are doing fantastic. I'll chime in on the basics:
1. Any recommendations for improvement in current investments ? trying out several diversification but unable to gain +10% gains
2. Money in Bank CD/MM, better way to invest it ? diversification in terms of specific index funds for this money?
3. We both do not have active 401K contribution now. any suggestions on opening Company 401K account + our 401K for tax savings . Ideal amount of contributions ?
4. Are we ready to FIRE in the next 10 years ?
1. Around here, most practice boglehead-type investing. Which means mostly low expense ratio index funds. Do all of your investments meet this criteria (including old 401k(s))? You should probably shoot for less than 0.1% ER (unless there is a compelling reason otherwise). Other than that, pick the asset allocation you are comfortable with.
2. In my opinion, since you are still some ways from FIRE, you are being too conservative with your fixed income portion of the asset allocation. I do not use CD/MM for anything other than dollars I need to spend in the very near future (if that). Instead consider putting that money in bonds, with a duration equivalent to when you might consider spending that money. (If no known duration, consider a Total Bond Fund.)
3. Yes. Absolutely open and max a solo 401k if you can, and same for your wife. You will be in a pretty high tax bracket, and so are looking at considerable savings. When/If you FIRE in ten years, you can pull a substantial amount of this money out at a presumably much lower tax bracket. Also, max backdoor Roth IRA if you can.
4. I think so. As long as you maintain a good savings rate, the formula for "FI" is pretty simple. All income minus all expenses divided by total investment assets should be less than the magical 4% (or whatever your number is). Seems like you are on the right track.
I hope in the very near future you get to laugh at your choice of user name. We were all there at one point, and we are still only making educated guesses about the future.