I would skip Epcot, I like the park, but I don’t know how much interest your kids will have in the World Showcase. My kids like shopping but it is still their least favorite park.
HS has ToT, RnR and some good shows for kid land too. I haven’t been to Toystory land yet but am looking forward to it. AK is my favorite park, I love the animals and EE, the safari. Once again, I haven’t been to Pandora, but can’t wait. I love how you feel like you are somewhere completely different and can relax there.