Heres a list.
Axe Hut (55 Wildy): Good thing about this is that the axes continously attack you in an inclosed hut, and dont stop for about 10 minutes. Therefor if a high level does come close you got time to finish your axes and then run :), plus if you 3/4 item out there, they wont kill you :)
Rock Crabs: This has been mentioned a bit, good place to train but quite a bit of clicking, also good to save food.
Pirates: South of port sarim near the ice giants, these guys are great, heaps of them and very rarely used on p2p, also they hit low and have decent hp :)
Black Knights: Traverly dungeon is the way to go on this one, lots of them, and they arent very strong.
White Knights: If you've done recruitment drive, go to fally and kill these, you get experience and kill totals on your knight count.
Tip: Use slayer tasks so you get more than 1 stat xp up.
