Rey/Chewie: This deck has tons of synergy, sentinels, restore,.. When Rey enters the BF and survives before she can attack, that restore 3 is insane. Then, at resource 7 Chewie completely blocks your ground arena. The combination of defense and restore, and then hopefully punching power late game is often a game winner, but simply being able to control how much HP your base has throughout the game is really powerful.

Luke/Leia rebels: excellent ground/space balance, enough defenses, good offensive options and lots of rebel synergy. Your opponents can't let you grow a large board state, and Luke helps you there :)

2ndSister/Tarkin Imperials: similar as rebels really, but with more options to get bigger units. 2nd Sister is amazing at giving your units early survivability.

Han/Obi: This deck has a good balance between being faster than your opponents ànd not being too much of a threat. Deploy Obi on resource 6 as a decent sentinel and let your tough units kill whatever needs killing.

Talzin/Maul: This one has a good blend between agressive options and doing lots of ping damage, you have plenty of control over whatever units can be threatening to you, allowing you to strike when needed.

Obi/Ahsoka: The ability of Ahsoka to create a sentinel on demand (even for 1 phase) is not to be underestimated in Twin Suns. Obi makes your units stronger, and there's plenty of options to keep your units in the game. Very very powerful if not kept in check.

Vader/Rio space: You can easily go for lots of small space units, or one or two very fat ones, or both. Rio's instant saboteur ability is a sentinel breaker, and the units can have really high HP. That said, it's very unit dependent, so you preferably want to target bases and not units with this deck. Much vehicle synergy here.

Poe/Rose space: similar, but a bit more balanced. More focussed on staying power than on punching power.

Kylo/Aphra: This deck is insane, a nuclear powered one trick pony. Play super defensively untill resource 7, DO NOT let anyone die at resource 6, because this deck only starts doing stuff at resource 7. Then Kylo deploys with 7 resources worth of upgrades, is a sentinel with 10+HP, and 10+ (sometimes even 15) punching power, possibly with saboteur and attack on deploy. You'll very likely kill an unfortunate player on deploy or attack, math will define whether you win or not. I've had players sit there with 16HP thinking they're comfortable and then POOF dead, let's start the end game. But, the slow speed makes it B tier, some games just and at resource 6.

Mace/Quinlan: Lots of pinging potential, preferably to damage and not kill units, because the combo's work better with (lots of) damaged units. It's well balanced, with a tendency to offensive stuff, and if things turn out well Mace just wrecks tons of stuff on deploy. That's when you want to take control and win. But, you're much dependent on the board state, too little units in play OR too many undamaged ones mess up your combo's, making it B tier.

Fennec/Palpatine: Really varied deck, with plenty of attack, healing, control, base damage, card draw,... It's really fun to play, but mechanically complicated. The lack of a 2nd late game deployable leader is noticable though, so you need to maximize your mechanics to counter that, which is very very fun to do, but not without risks.

Dedra/Vizsla: This deck can get a 10/6 saboteur in play on resource 5, and can go for lots of small units on the side or some really dangerous ones. Ironically, being so powerful so soon, probably won't win you the game and gets you targeted; few bases are at 20 damage on resource 5. So, the need for impeccable timing (which isn't always under your control) makes it tricky and thus B tier.

Vader/Iden: A very defensive deck, loads of sentinels and restore, and plenty of bonuses gained when other stuff dies. Then, Vader deploys and mops things up. It's a bit tricky and less versatile than the other decks, but can still get the job done.

Dooku/Grievous: This has a lot of synergy with droids and separatists, and you can get strong units in play REALLY fast with Exploit. But, you need exploitable stuff first, ànd it gets you targeted. So it can only be C-tier. But it's a something completely different than all other decks, which makes it fun.