A samurai idea : going backwards
We all hope to see a Samurai in the next expansion...ok, maybe not all, but at least some of us. And I'd personally love to see it as a DPS, since DRK has supposedly taken its place as a tank.
But what gameplay could he have to make it stand out from MNK, DRG and NIN ?
I present you : The reverse combo.
Until now, each job starts learning its skills by its combo opener, the weakest attack, and slowly moves towards several finishers to unleash really big blows.
What if SAM could do this backwards ? Learning its finisher first and, as it slowly gains levels, learn several weapon skills that would enhance its finisher.
For example (And I'll use FFXI names just for the sake of naming) : You could learn Tachi: Enpi first as a WS with 150 potency.
After several levels, you can learn Tachi: Goten, that adds 100 potency to your next Tachi: Enpi, and further away, Tachi: Yukikaze, who makes your next Tachi: Enpi increase your damage by 20% for 20s.
You could add a DoT bonus, a leech effect, a slow effect, pretty much anything you want to make SAM stand out...but restrict the number of effect you can have at the same time by a trait with different tier (Like Astral Fire/Umbral Ice or Aetherflow).
And, at level 50, you could learn the ultimate skill which would allow you to stack as many different bonuses as you want for a few seconds.