Racers do not usually win alone on their 1-min power. Non racers can have very high 1 min power. When do you want that power?
At 15 min in - or at the end of a race - and how long is the race and how many hills before...
Looking at your charts - do leg presses - partial range and take supplements - creatine and protein and don't worry about your weight. You may get slower, but your 1 min power will go up.

You will likely not have Lactate - or even Lactic Acid issues for the 1st one min power output, but subsequent efforts have more to do with fitness and your ability to deal with LA than actual 1 min power capabilities.