Romaine lettuce is very safe for your veiled chameleon. It's rich in vitamins like vitamin A, vitamin C, calcium, Vitamin K, folate, magnesium, and whatnot. It also contains traces of proteins.
Keeping more than one veiled chameleon in a cage is not advisable in general. Given the temperament of veiled chameleons, it is best to keep them separate.
A nightcrawler is a worm that is beneficial to aeration of garden soil. Nightcrawlers are not commonly fed to veiled chameleons, nor are they recommended as food in a chameleon’s staple diet.