So I am playing the latest grim reborn mod and I was able to create a new levelling rate and boosted monster hp. It has been quite enjoyable! I also increased max level to 120 so it will be interesting as reaching that will be more hardcore than titan quest level 75 lol. Here is my current new experience chart. I am currently only at homestead. Not power levelling feels a lot better. I have also focused alot more on early gear. Loving it 
lv1= 104exp
lv2= 272exp
lv3= 636exp (1,012exp)
lv4= 1216exp (2,228exp)
lv5= 2065exp (4,293exp)
lv6= 3224exp (7,517exp)
lv7= 4734exp (12,251exp)
lv8= 6632exp (18,883exp)
lv9= 8954exp (27,837exp) (first 10 levels)
lv10= 11730exp (39,567exp)
lv11= 14996exp (54,563exp)
lv12= 18777exp (73,340exp)
lv13= 23107exp (96,447exp)
lv14= 28010exp (124,457exp)
lv15= 33517exp (157,974exp)
lv16= 39651exp (197,625exp)
lv17= 46439exp (244,064exp)
lv18= 53907exp (297,971exp)
lv19= 62078exp (360,049exp) (20 levels)
lv20= 70976exp (431,025exp)
lv21= 80625exp (511,650exp)
lv22= 91048exp (602,698exp)
lv23= 102266exp (704,964exp)
lv24= 114303exp (819.267exp)
lv25= 127180exp (946,447exp)
lv26= 140916exp (1,087.363exp)
lv27= 155535exp (1,242,898exp)
lv28= 171057exp (1,413,955exp)
lv29= 187501exp (1,601,456exp) (30 levels)
lv30= 204888exp (1,806,344exp)
lv31= 223237exp (2,029,581exp)
lv32= 242568exp (2,272,149exp)
lv33= 262900exp (2,535,049exp)
lv34= 284252exp (2,819,301exp)
lv35= 306644exp (3,125,945exp)
lv36= 330090exp (3,456,035exp)
lv37= 354615exp (3,810,650exp)
lv38= 380231exp (4,190,881exp)
lv39= 406961exp (4,597,842exp) (40 levels)
lv40= 434818exp (5,032,660exp)
lv41= 463821exp (5,496,481exp)
lv42= ???exp (6,163,573exp) (exp amount changed?) 667092exp difference, unsure why lol
lv43= 540643exp (6,704,216exp)
lv44= 574143exp (7,278,359exp)