At what level can one start to take on Freeport Militia Guards for experience?

[Loadsamoney]

I'm kind of fed up with Crystal Caverns at this point because, much like High Keep, the entire zone is overcamped to the point where I'm never able to get anything other than Stalag Terrors to fight. Geodes are practically on 24/7 lockdown, Orcs are no longer feasible for experience, and Spiders are very risky because of adds.

I'm game to go get myself a bow/Tolan's now and either hunt Frost Giants or take a crack at Freeport Guards, since my Freeport Militia faction is shot anyway (and they're evil, so I don't want good faction with them regardless). Are Freeport Guards soloable for a 45 Ranger, or should I look elsewhere.

Is 45 enough to solo anything that drops Thurgadin armor pieces in Kael?