In short yes, you can, but i doubt it will make it better. Not sure how worse it become. You got much more from str and if you plan on just using your fists i don't recommend going below 15.
If i want to get 7 will, i will get dex to 10 and use pneumo metal glove to proc the combo, so you still will deal a good dmg to lightly armored enemy. I don't recommend force user tho, with low str you better get some survival feats, like escape artist or maybe nimble. Not stoicism, you a 3 con psion not a hammer wizard you don't have enough effective hp to get much value from it. But the only high will puncher I try was an original time monk, and i can't recommend to stay out of it high enough, if you don’t want a throwing pk wizard at the end, who sometimes can punch old man and disabled children.
If you want 10 will (for lore) I guess you better get a tm – tc knifer. I got some sweet build from Knifegaf that I sure will be great.
https://underrail.info/build/?HgMOBwMDCgYAAAB2KABLAAAAAFYAAAwAZwAASQAAADlhAAYSE1w8SysqwochP8KzMcKIQt-_But its all 3 coner with psi, i guess somewere on a forum was 3 coner 10 will ar gunner, who is much more first timer friendly. Still 3 con, but ar will make it easy for you.
