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Requiescat Sword WAR/RDM/PLD/DRK/SAM/BLU/COR

•A new "Weapon Skill" category will be added to the merit point menu.
•Maximum total value: 15
•Upgrade levels: 5
•Merit points needed for each upgrade: 10/15/20/25/30
•To unlock these merit point weapon skills and the corresponding menu, players must first complete a quest offered by the Nomad Moogle NPC in Ru'Lude Gardens.
*To undertake this quest, the player's main job must be level 96 or higher.
*On the test server, the merit point weapon skill menu will be accessible from the start, with no need to complete the aforementioned quest.
•Each individual weapon skill may be learned by assigning at least one merit point to it.
•Additional merit points allocated to a particular skill will incrementally enhance its power.
•The following conditions must be met to use a skill after learning it:
•The PC's main job must be eligible for the skill in question (see chart below).
•Job level must be 96 or higher.
•The corresponding weapon skill attribute must be 357 or higher.

It's a five hit. But it has -20% attack penalty @100% TP, and it doesn't go away even at 300% TP. Even at 5/5 I'd still stick with Vorpal on anything higher then you in levels. Or CDC if you have it.

That would be possible if it was a direct -X attack penalty, but because it's a percentage any attack boost you use is also reduced. Meaning if the monster had 450 defense (900 attack required for 1H cap) then you'd need 1125 attack to cap out with req. That's a 225 attack kick in the nuts. What's worse is the three sword using jobs (PLD / BLU / RDM) are not known to have really high attack values to begin with. So while this WS would work on EM monsters or other low defense monsters, anything bigger it would suck hard core on. Vorpal beats it pretty soundly. Also remember there is no way in hell your gonna cap fSTR on a non-STR WSC weapon skill, maybe a RDM might with a good enough enhancing set for gain-STR, but otherwise you'll be putting MND (req) or DEX (CDC) in as many slots as possible.

I'll test it again but I remember invincible making it do 0 damage.

the only way i think you could overcome the -20% att is with a fairly decent chaos roll.

Would the -20% Penalty become lower as you merit it?

Nope, its -20% at 1/5 and -20% at 5/5. Only thing the merits change is the WSC value. It says 17% for each upgrade but some people over on BG tested it at 20% with 5/5 being 100% WSC.

From what I can see -PDT is still in effect, it's still a physical damage WS, it just has no subtype. Need more testing to confirm all this as I was just messing around with it on the test server. There might be some sunlight at the end of the tunnel for non-CDC RDM/BLU/PLD's.

The basic gist of it is at 5/5 Merits, Requiescat has a 100% MND mod, is a 5-hit WS, but comes with a very debilitating -20% attack debuff.

The 100% MND mod and the 5-hit make it attractive, but the -20% attack debuff is pretty much a deal breaker. I would say if you already have CDC, it isn't worth it as the 60% DEX mod is more useful in the long run. I have seen reports of Vorpal being fairly competetive with Requiescat too.

It might be worth it because the description does say that it has some ability to overcome physical resistances (not immunities), but I am unclear on how or what.