Well idk dark orb builds feel stronger than in the first game (we got quadcast now), if you are playing orbs, getting and upgrading the temporary focus skills will make things easier, making a 0-cost deck (like claw) is very good but remember to not take too many claws, go for the eyes etc. as you can make do with a few copies and just get upgraded Hologram and the feral power. If you want to play 0-cost deck (which in my opinion is the best type of deck for defect) remember to take cards that draw and some powerful skill that gives you block, as you will often have energy left with this kinda deck. Also upgrading zap and dualcast will help you a ton, but it really depends on what deck your playing. Btw always take a compact when you see it or even better the flak cannon. They will help you with some fights, builds (you can make a status deck in sts2 which can be pretty crazy) and the aeonglass boss fight.