you're best off using the d2r (or d2) char planner:
https://d2.maxroll.gg/d2planner/equip the items you have and select the level you have (dont forget to press enter)
what i always do is start with some skills, like 20 hammer 15 conc 15 vigor etc and maybe 18 foh 16 holy shock (just a random example) until you used all of your skills and put 1 in the requirements like convi.
then remove like a point from vigor, add one to conc (see if your damage increases)
repeat this proces until you get optimal hammer dmg
and then repeat this proces until you get optimal foh dmg, remove a point from holy shock, add one to foh (if it lowers try the other way around)
theres on such thing as ''perfect'' dmg distribution between hammer and foh, this is a personal preference
some people prefer having 7k hammer 7k foh, some people prefer 10k hammer 5.5k foh for example
for d2r i would personally aim for ~ 8-10k hammer and rest into foh while maintaining 125 fcr