Kerbs isn't the best place to train a Lion. From my experience, Kerbs tend to have decent accuracy and since Lions are unable to equip a shield, we're inherently lacking on the DP and HP front. Chaos Tower 44 is the more ideal spot for a Lion to train since CT mobs are lacking on the accuracy side.
I can help you get a feel for how much accuracy you need to kill @ CT44 once I log into my Lion and check my gears. Keep in mind that one of the monsters uses Shockvibe so you'll have to consider that as well.