Question about Dual Flower EX skill

[Xmax4k]

It seems that whatever weapon you have equiped in second hand will do slash type damage regardless, very weird. You can equip swords that do group attack in the second hand and they will actually do a group attack, yet also without HP/DP cost.
Which makes me assume its not just numbers of whatever weapon you hold in the second hand that matter. Will Viande scroll skills still apply if i equip scroll in the second hand?
Im thinking of doing Viande -> Shinobushi -> Am Altea reincarnation. Is this a viable idea for dual weilding or are there other ways to dual weild in this game?
I currently have Shinobushi reincarnated as a Lancer, dunno if i want to actually give her a spear or should i have dedicated normal lancer.
I miss Etrian Oddysey 4 class...

[Ѭ‡∴ℱ𓇀𓉂⎆]

Are you sure?

I ask because I believe there was an exploit in the Japanese version where you could do that Transforming weapon + Sword and have the sword have the Transforming Property, and the author of the GAMEFAQs guide for the game confirmed that doesn't work anymore, though I'm not at final team building yet so I may be misunderstanding what was said.

[Xmax4k]

Whatever weapon you have in the second hand will have slash type damage. If you have a spear for example and skill activates, both attacks are slash type. Not slash followed by the pierce

[暗黒盆踊り]

In conclusion, the description of Dual Flower EX is incorrect with the actual effect. English translation is correct but Japanese description is incorrect in the first place.

The actual effect;
The first attack is with the dominant hand weapon.
The second attack is with the dominant hand weapon, damage is 75%, and it applied off-hand weapon's attack range.

If your puppet soldier has a slash type weapon in the dominant hand and activates the skill, it does slash type attack twice.
This skill wouldn't attacks with off-hand weapon. Only Shinomashira's Dual Blade Expart is does.

[Xmax4k]

I believe 75% is about character's HP tho, as in it wont activate if characters HP is bellow 75%.
So you still need weapons in both hands and for them to be S+ mastery? Its very weird how attack is with dominant hand, yet range of off hand is apllied.
I missed that Shinomashira had a skill like that, guess ill incorporate it into my grinding routine. Hopefully it will give 3 attacks per character if im lucky.
like
>dominant hand
>dominant hand with off hand range
>off hand weapon