anywho, I finally got time now
1: its valhalla agents, that much is clear. Since its that, you should be using 3 valhallas, no exceptions. I'd side the two maxx "c" to add them in
2: try not to go over 8 high lv monsters, as you wont enjoy it when you draw multiples of thm with no valhalla, or worse, they blow it up. I'd recommend 3 hyperion, 2 kristyas, 2 tethys and 1 Anthena.
3: the angel 07 is for dragon rulers, that is clear. What you dont know, is that Kristya will hurt dragon rulers just as brutally as Angel 07 will, difference is Kristya can summon itself, Angel 07 can't. I'd side deck it for now
4: Gorz + continuous cards that will stay on the field doesn't help. Use 1-2 tragogedia instead.
I'll help more later