Ok I would add some worms and different insects to his diet -- a variety -- here is a website for nutrition ignore the kale thing its a good staple feeder http://www.beautifuldragons.com/Nutrition.html
Here is some websites for insects / worms www.dubiaroaches.com great roaches - I would get him some medium super worms and some horn worms order in small amounts they grow really fast you can also get nutrigrubs also known as BSFL calci worms or phoenix worms -- order large and do not dust them -- feed as many as you want as salad toppers - make sure you have a glass or ceramic dish so worms / insects cant get out www.reptilianarts.com great silk worms - they only have cupped w/ food last I looked - I try and get bulk like 50 they come small and you would need to order food and clean containers out daily-- www.symtonbsf.com these are BSFL --
Karrie