[Lawful_g]

Problem 1 - I don't think you can do this. You could search for things with the tag for spell like abilities, but there is no field for Caster Level for you to check for 6th level for.

Problem 2 - If the size must be large, make an expr req

herofield[tSize].value = 1

If you mean size large or larger look at Awesome blow feat for:

herofield[tSize].value >= 1

If you mean size large or smaller do:

herofield[tSize].value <= 1

Problem 3 - If any fly speed will be fine look at the "Flyby Attack" feat to find:

hero.child[xFly].field[Value].value > 0

If there must be a minimum fly speed of "#" feet:

hero.child[xFly].field[Value].value >= Whatever #



For the Claw and bite damage, d8 damage is added via a "wMain.1d8_6"



On the class special, click the bootstrap, you should see the feat you bootstrapped... the rightmost button is called Condition. Click on that and change the "Phase" to First and the "Priority" field to 500. Include the below in the "Tag Expression" field:

count:Classes.XXX >= #

Where XXX is the classes identifier (usually the name, but you could choose to have given it a different one when you made the class) and # is the number of levels the class must have before the feat is added.