Lvl 16 Pally Where is a good place to solo?

[Swish]

Oasis, plenty of orcs wandering about...stay towards the North Ro end along the west wall and you'll be good there til 19ish.

Alternatively, kerrans in Erud's crossing (should be at least 1-2 you can single pull, lull for more to get those split).

West Karana bandits

Dervish cutthroats wherever you find them

Upper guk crocs (not kos and not social)...found before the spiders fairly near the zoneline to Innothule

Unrest trash (esp if you're using a ghoulbane)

Kurn's Tower?