Sea Deity, Abyss Neptune

Well Neptune was definitely around LONG before Beezlebub made his debut.

I used this guy in ancient gear-Master. The 55% reduction was helpful, but i wish i had chosen a shining lance wielder, Odin. He has 80% reduction. But only when health is FULL though...

For your team, or for mine?

For bosses.

W/D I think is better, but it all goes down to what color (Light or Dark) or Type (Physical or Devil) you use the most as the active and stats remain the same on both.
Personally, I find W/D better just because the leader skill makes farming Hera-Is and other Blue or mostly Dark dungeons easier. I also run mostly Dark and devil teams.
His W/L is perfect for Physical teams due to blue being Physical's staple color, his overall great stats (specially recovery) and high unblockable poison dmg active.

There are some bosses, like Beezlebub, that change orbs to poison and if you match 3 or more of them they drain your health. Not very a very common skill among bosses yet.

and i just got him from this players choice god-fest. talk about lucks with the benchwarmers

As if he was never a benchwarmer to some extent... I'll admit: I have a Neptune myself, and he has helped a lot during certain levels, but he really isn't as amazing as many of the other gods out there (10x poison sure speeds things up against Zeus in Starlight though)

"Hydra's Poison". Snakes are immune to their own venom.

Maybe so, but many snakes are not immune to the venom of other snakes. Of course, this isn't any old snake... it's a god.