Absolutely the BEST for caving!

Wear ghuille armor and load soothing balm and spoiled meat in your bar. Then sneak up and tame the very lowest level you can. After it follows you out of the cave, saddle up and go back in. Now Everything ignores you!

I repeat: Everything Ignores you while riding on your Araneo!

Then tame as high a level Araneo and Arthropluera you can find using balm and spoiled meat. If you dont find one you like, just leave the cave and re-enter until you do. I got level 290 of each (on hard difficulty) in about an hour!