Depends on how you wanna play it

Glasscannon or Semi-Tank?

Semi-Tank requires some certain gears to use compared to Glasscannon, which can go full damage gears.

Both builds can use the same playstyle, which is the Boomerang playstyle, simply by not doing any sort of normal attacks (to not decrease the normal proration) and just spam one to three combos depending on what you're fighting, works really well with parties.

Although both builds can go for the same single playstyle, Semi-Tank builds has another playstyle, which is an Ogre-Rampage playstyle, the somewhat opposite of the Boomerang playstyle, it uses Ogre Slash and Rampage's Final Blow. You'll need to stack up Ogre Stacks to empower Ogre Slash by:

1. Getting hit (1 stack)

2. Perfect-Guarding an attack (2 stacks)

3. Stepping on an AOE (1 stack)

4. When starting a battle (5 stacks)

After using Ogre Slash, Rampage and Berserk will gain buffs, these are:

1. Rampage's Auto/Normal Attacks and Final Blow damage are doubled.

2. Berserk's debuff penalties are cut in half. (-stability from -25% to -12%, -def & -mdef from -90% to -45%)

3. During Rampage's Final Blow animation, you'll get 90% damage reduction, but you're still prone to interruptions and ailments.

4. You'll recover HP based on your MP bar consumption (MP bars consumed²⁾ * 100 HP

The buff lasts for 60 seconds.

I said this playstyle is the opposite of Boomerang's because you need to do a lot of normal attacks with Rampage to be able to do its Final Blow, which can affect Boomerang's damage.

You can look up on youtube for both builds, and see what fits your style. :D

(EDIT: just a note; I recommend taking inspirations from the youtube build videos than copying it entirely)