Sorry I thought you need the OC settings which impact your mining. That is what I understood when you said "Optimal". Other settings in Phoenix do different things, but rarely impact speed. For example they show a time stamp or stop logging which fills the hard drive, or pausing after an error so you can see what happened and why it crashed, or set -straps 2 which I use for my 1080Ti. None of these are intended to Optimize your mining, just gives you more information. Maybe helps you set overclocking in the bat file so you dont have to manually do it in MSI.

To optimize your speed to 120, If you have MSI Afterburner, that link even shows you a screen shot. I think you can also set the parameters using Phoenixminer - type settings but I personally dont do that, I just use MSI since I only have a few miners and I can manually do it.

From that website:
120 MH/s with a
+1350 memory clock
and a 100% power limit
GPU is consuming 300W of power.
If the power limit is lowered, the hash rates starts to drop dramatically.

Here you go:
https://www.nicehash.com/blog/post/nvidia-geforce-rtx-3090-mining-hashrate

I dont but I know how you can increase your hashrate by 60%:

1. Sell the 3090 for $2500
2. Buy 2 x 3080s for $2500
3. Watch your hashrate go from 119 to 190 (60% increase for free)
4. Enjoy much higher resale value in 3 years for 2x3080 vs 1x3090

Not trying to be smart, just letting you know the reality. 3090 is not an ideal card for mining for its street cost and you should sell it while it trades for over $2500 still:

https://docs.google.com/spreadsheets/d/1skWc9l2iQtD1IqSxHeqE3vL_D-2lgDqcdtaQ9SDk_nI/edit#gid=482228725