Since it hasn't been brought up yet: the uncapping of CoP areas mad access to another spell easier, Memento Mori, from the NM Keremetet (?) which you need to kill for a key during one of the missions. According to the wiki he's under 60, so he's about half a dozen levels lower than the Attohwa Chasm ones - I'm not sure his difficulty is too enhanced by the NM factor, but it's an option worth considering.
Apparently you can't call NPCs there for help, so it's unlikely to be able to get th spell solo at learning level, but it got simpler.
I wish I'd remembered this when people in my LS made mentions of getting that CoP mission out of the way in this past couple of days... hopefully's not too late...
Monk: no magic, no weapons, no problem
When things go bad remember: levels may come and go, but skill-ups are forever.