Actually, if you read what I said more closely, I was talking strictly about Melee...
Merits 5%
dDEX 20%
Razed Ruins 30%
Claymore Grip 3%
Rancor Collar 5%
thats 63% Critical hit rate base, adding Gnarled Horn will push that up to 83% (Atma boost caps at +50%?) which is very impressive for Melee DoT. Now you can simply check this on Paper to find that *FOR MELEE ONLY* Gnarled Horn > Apoc and ill show it here.
Its a safe assumption that WAR Crits 3x harder than our Melee hits correct? so we'll just say our Melee hits are fixed at 350 Damage making each Crit 1050 Damage
And cuz Im oldschool we'll just say its Bravura were using and not counting the hidden effect so
488 Delay - Gear Haste - Hasso = 317 Delay = 5.28 seconds per attack = 681 Attacks per hour
using a Rancor Collar, your DA Rate will be 29%
Ill start with Apocalypse Atma:
Swing Ratio (being Generous) 44:29:15
Swings per Hour: 300:394:306 = 1000 Swings per hour (lol 1000 Exactly)
Critical Hits per Hour (63%) = 630 Critical Hits and 370 Normal Hits
Normal: 370 x 350 = 129,500 Damage per Hour
Critical: 630 x 1050 = 661,500 Damage per Hour
Total: 791,000 Damage Per Hour
WSs per Hour (6/5 Hit): 199 (This is assuming a dream world where WS Animation is tiny and doesnt stop our melee lol)
Gnarled Horn Atma:
Swing Ratio: 71:29
Swings per Hour: 483 + 394 = 877 (12.3% Fewer Swings)
Critical Hits per Hour (83%) = 728 (13.5% More Crits) and 149 Normal Hits
Normal: 149 x 350 = 52,150
Critical: 728 x 1050 = 764,400
Total Damage per Hour: 816,550 (3.2% More)
WS's per Hour = 175 (12.1% Fewer WSs)
Can see simply enough that if you do not want to WS, Gnarled Horn will do more damage than Apoc Atma. And I stress MELEE DOT ONLY keep getting replies where people arent reading what Im saying lol. I dont need to go into any probable math to see that when you start WSing, Apoc will poopoo on Gnarled Horn lol 12.1% fewer WSs and only 3.2% better Damage so its a "Pearl Jam" Atma only pretty much.
As for the Temporary Item, if your party is operating as it should, Azure should be kept high, and Blue Boxes should be opened on sight. Stalwart's Tonic lasts 5 minutes, and Item Boxes appear more frequently than Time Extensions more often than not. The odds of you *NOT* having a Stalwart's during an XP party (XP Party NOT a Raid) are staggering lol. So yea, you can pretty much count on having it, I just never really used it but Im definitely going to now xD
Edit:
Oh and I will say again, I AM NOT talking 6-hit vs 5-hit here Im just saying Gnarled Horn indeed has a purpose and that with Temporary Items, if your a WAR that likes a 5-hit Build, now you can get it and still keep a super high Attack, thats all Im saying lol