As far as I know, At least in a direct sense, there is no X attack is equal to having X Damage. They are complimentary however, so as an indirect result of having a ton of attack, you may wind up doing more damage over time than a higher damage weapons.
Essentially weapon DMG affects the absolute damage cap (Before certain values are added, such as Direct Damage bonuses like Souleater) and a high Attack vs Def value forces the numbers to be generated closer to the weapons cap.
To my understanding Weapon damage also has an influence on your ability to hit for 0 in the case of weapons such as Fendoir or MKris, but not really as a direct result of the actual Weapon damage. fSTR caps at a penalty on High level stuff with a weapon with incredibly low damage so occasionally the game will draw low. You can have enough attack to overwhelm that low-draw, but saying weapon damage has absolutely no effect on hitting for 0 is not entirely true, though not entirely false at the same time.
In regards to the Eye of Verthandi OAT Scythe, Aside for about 99% of non HNM endgame application,t he OAT's are generally the most powerful weapons next to Relic Weapons (Perhaps in some cases still better, but I've not seen any situation confirming that yet). In Situations where you are attacking targets with dangerous TP moves, using an OAT weapon is Tantamount to suicide.
Again, this just reaffirms the old (good)players-rule of the right tool, for the right job.
Apocalypse: Victory Achieved!
OAT: Merits/Assorted Low (~83) Targets.
MaxDMG: Big Game.
Hybrid1(DMG100 Def Down): High-Defense Targets.
Hybrid2(DMG97ATK/STR+): Low-Defense(Colibri)
Liberator: Trip to Lunatic Asylum.
Bahamut.Raenryong said:
Actually, I think the magian weapons were oddly shown to have the extra DMG included in their weapon rank :O
For most weapons, it's floor(DMG/9). Floor means to cut off all decimals, do not round!
At first they didn't, Now the do. It was sort of the same issue with the Ranged weapons, but it was overlooked or not tested correctly. Since the Portafurnace patch however, everything has worked as expected. [GM]Iskaldur was particularly helpful when I reported the issue.