I can't tell you the best place as I dont have that character however a really good starting place is Jutes website.
Go to the player guides thread, Jutes spreadsheets and click Jutes Site. There is a section there that list mobs by name, type (mob or raid boss), level and area. Just have a look for around your level, go to the area and see how you get on. I have found this post really useful hope you do too.
Death Pass, a little bit in, basilisks, road scavengers, wyrms...easy solo
I would suggest Death Pass also, that whole area is a great place to level all the way up till 40. If you find them starting to get a bit easy you can move further up north and you will find a huge patch of Grandis and Windsus which are great xp.
well i did eg with my assassin (not a palus knight i know but close enough) just get buffs from someone in dion or race track and then run to eg and solo then go back and get more buffs...kinda slow but i managed to get alot more adena then ss cost me