To get a better understanding and feeling of the game in general and see people experience it, I would suggest you head over to YouTube and look up some really cool gameplay videos
Hill Giant stats and an almost blank chapter 1 arent especially impressive, but the risk seems worth it in the right deck
Green Ultimates MegaKabuterimon is the first of the two (yeah, two, I don't get it) 30 DP, Green Ultimates
Fleshbag Marauder and Merciless Executioner are my first choice, though sometimes you just block with one of your other creatures
Adjusted Difficulty: Once you resolve Shi En, many risks disappear, simplifying both your decision making and the gamestate
With the ability to prevent players from being attacked, Arboria can be an incredible stalling tactic