If luck isn't on your side, try saving up Pack Points and then spend them on the immersive card of your choice
If the target creature's power is increased to 3 or greater after Deserter's Disciple's ability is activated but before it resolves, the ability doesn't resolve
Re: the EX Dragon pack those data points are from me, and indicate that that there should be heavy packs that exist in the 17.5x range (heavies typically weigh .1 to .2 more than lights, and there were numerous lights in the 17.3x range)
The main issue this deck is going to face will just be reliable energy acceleration
10 Sunfall Board wipes are spells, typically sorceries, that can destroy or exile every creature on the battlefield at once, such as the classic Wrath of God and the uncounterable Supreme Verdict
Unless you have a preference based on color or Disney character, any of the starter decks is a viable beginning