Interestingly, Mills averages 0.05 goals per game over 267 games and Harriman 0.03 over 257.
Looks like you'd be mad to bet on either!
Even more interestingly his goals per game ratio has more than trebled since joining Forest Green at over .17 per game scoring 14 in 83. Prior to that he scored 4 in 184, so he has become quite prolific in his position in the last couple of seasons? Have to careful with stats, depends how you present them?
https://www.transfermarkt.com/joseph-mills/detaillierteleistungsdaten/spieler/81876