This is one of those cases where it's hard to give you an answer without some idea of what your collection looks like.
Characters: Is Kylo/Night Sisters just because you don't have another option? Or are you aiming for a specific strategy?
Battlefield: You want to decide whether you are likely to be claiming the battlefield a lot. In this case, you've got split damage types, and a lot of events, so you probably won't claim too much. Jedi Temple is one that can easily turn against you - I'd pick something safer. Mos Eisley is the default 'benign' choice, but Rebel War Room for Kylo could be an option for Kylo, or just one of the more generic ones.
Events: Boundless Ambition is kind of bad without a specific goal in mind- you cycle your hand each turn anyway, so you're just drawing cards now that you probably won't actually be able to afford. I find resources are almost always more limited than cards, so it's just not that useful.
Close Quarters Assault, I think this is a card for pure melee decks, instead of a mixed one. You're not likely to consistently have the melee damage when you draw this.
Power of the Force is iffy, because of the low numbers of upgrades.
Some possible replacements would be Enrage (taking damage is bad, but resources are good) and Flank (Dice removal is king, and you'll usually be able to use this). Most of the other options don't really fit that well - Force Strike is a possibility I guess, but Kylo's awful pay side hurts, a lot.
Supports: Powers of the Dark Side is okay, though expensive for what it does. You don't really have a particularly large number of blanks to make it really good, so this could stay or leave. It Binds All Things is good, though you may not have enough supports to really make use of it.
I'm guessing you don't have any more Holocrons, or the Legendary blue upgrades. If you do, they are all worth running.
FORCE THROW! Unless you don't have a Rey starter. But seriously, Force Throw is one of the best cards in the game. It's nuts. If you've got the Rey Starter, play it.
Hidden in Shadows could be okay for the deck. It's slow, but one of it's main problems is it doesn't do anything unless the character is taking damage. Night Sister gets around that by doing damage to herself, so it'll always be useful, and could give them a bit of extra longevity.
Datapad/Comlink are decent filler to push up your Upgrade count. Remember, you can always replace them with something better, which makes them essentially free. Even if you only plan to use them for one turn, they can still be useful.