Here, I just spent a bunch of time testing and perfecting a Draw build for the last 2 and a half hours.
4 Rough Seas Banshee
4 Knight Spirit
4 Ghoul Cannonball
4 Rick the Ghostie
1 Captain Nightkid
3 Dandy Guy Romario (For use with Silver and Undead Skull)
4 Gust Jinn
4 Dancing Cutlass (Put behind Ruin Shade or Deadly Swordmaster / Trade for Deadly Spirit or Samurai Spirit)
4 Samurai Spirit
3 Sea Navigator Silver (Since these are in front of Romarios, trade for Undead Dragon late game)
4 Deadly Spirit (Trade with cutlass. Late game trade for Undead Dragon)
3 Ruin Shade (Use with Cutlass)
4 Basskirk (Put nightkid behind V, swap extra copies for Undead Dragon late game)
3 Deadly Swordmaster (For use with Cutlass. Late game, swap out for Undead Dragon, or swap for Spirit for more shield)
1 Undead Skull Dragon
Play:
Call cutlasses to draw. Put them behind one of 6 viable attacker targets or swap with one of 7 viable swap targets. Basskirk fuels the soul so hard you'll never run out. Even in games where I used 3 Cutlass and 2 Deadly Spirit, I had soul leftover (and that was a pretty long game). Don't be afraid to chain Cutlass > Spirit > Dragon late game in case you need a quick 3 stages.
Silver is a weird choice but it works, and I don't argue with that. With Romario behind him, he usually hits vanguards especially early game. You can trade him for a Spirit or Dragon (late) since Romario should already be behind him.
Nightkid goes behind the vanguard and probably shouldn't even be used. I used it like once to set up Undead Dragon in late game because my hand was so big anyway.
12 crits because it gives you the same shielding as with draws on average except you get extra critical effects. Yay. Banshee is also an easy trade-out for soul in a pinch.
Try to ride samurai spirit and soulblast it later to replace cutlass with it. That's actually my favorite gambit. You can replace one of these with Romario if it turns out to make the other plays more consistent. If you do trade the Romario, change one Deadly Spirit with one Silver.
Narukami is the deck that should've given it the biggest trouble so I exclusively tested that (I didn't get much time to make this). Granblue came out way ahead each time, though the game progressed dangerously long into mill territory. But Granblue won each game with 5-6 hand. So it can definitely plus harder than Narukami, even when Narukami Vermillions twice.