so, my power usage is really high (I dont have atm a kill a watt to check it). any advice ?
You must have a card with around 220W TDP. it doesn't look like you are even limiting the TDP with your current setting of 80% as the card is only running at 75% anyway.
My cards are all 180W TDP, running at 85% (about 130W). You should be able to drop the card right back to around 60% which will bring down your Sol/s but will bring up your Sol/W. Just do some calculations on the cost of your electricity vs the income of the shares and you will see that it is better to run at a lower Sol/s that uses less power. It will result in more $$$ in your pocket and less in the pocket of the power company.