Level an archer instead and wait on the th sword user till after there is an option for them to have % crit or for the game designers to change the crit rate formula. Or level a spear user with hop3.
Look at it this way. Are late game monsters like tanks, yes they have high hp, resistance and crit resistance. What have other games like league of legends done with the math on how to optimize a ad carry items to kill tanks? Just stacking physical attack isn’t enough, even if you auto for 3000-4000 when there are several couple-hundred thousand hp monsters aggroed to you.
Of course this is a team game so the burden should be split up. However there are issues with low player population resulting from various other issues.