JackSparrowYAY
Everybody except one person in this server would say that ForceMasters suck ***** against bosses. I might be the second person lol. But since I'm the first one to post an answer and can't see any important problems with FMs doing boss hunting, I might just say my honest opinions.
Your topic title says that you need help with increasing your asal damage, which has nothing to do with anything about PvE. As a non-donor FM, your damage will be slightly lower than other classes because of factors like weapon attack rate, but the only thing you need to do is to pump in as much ICD and atk% bonuses and awakes as possible. Once you start using aurum and donor gear, your damage will be significantly better. Make sure you get an ATK knuckle and not MP, though.
As a FD ForceMaster SOPA ICD, your damage will be better than Seraphs (and maybe also crackshooter, idk) because of the ICD bonus from your aurum. Just remember to never PvP with icd forcemaster as STR/INT ones are a lot better, and always bring a seraph when doing boss hunting.