Demon Slayer / Dark Knight / Paladin ?

i have a hero , HP around 5xk MP around 2xk with clean eq , when RED come , i should change to drk or pala ?

i have a demon slayer too .

but my equips havent compleate.
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i search YouTube and see between thoes job , both also nice

Drk
i not so know about the drk, i saw the forum skill write , the attack skill base att is see HP ? mean high Base Hp high damage ?

Pala
high def , can revive pt , can invincible (for long time)

DemonSlayer
my eq let me feel like damage no enf . DI att not so fast.. but the hyper boost up nice.

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For Bossing ..
with thoes item , which job would u choose?

Cygnus Full Set

STR : 10,000
Weapon : Boss Dmg 60% , Ignore Def 30% (let say 10 * +5wa miracle scroll)
2nd Wep: Boss Dmg 60% , Ignore Def 30%

i need high dps in this 3 job , which 1 will owned ? pls help

Change to paladin