least used PVP element,card and duo?

[Glitch]

Uhh...
 / anyone?

Winged Shriekers?
Foggy Golems?
Plated Wyrms?
I think Dragon Fog? would do the best.

Addressing them in order:

Either A) you have a time mark, in which case you're just slowing down a shrieker rush, or B) you don't, in which case you just have to pray your opponent took no winged creatures.  Either way, you'd do better with phase shield (hence earth/aether decks)

Wait wait wait.  Isn't this the exact same deck you just posted but with a different air shield and a different hitter?  Earth has plenty shielding to not need air, and as there are duos with way better shields (gravity, for one), taking fog off of an air mark isn't a good idea.

Plated Wyrms?   You mean a dive deck with random plate armors?  Isn't that just like a normal dive deck but slower?  And worse of a duo?

Air dragons get more attack for their quanta cost, and seeing as fog costs 1, it'd probably be better to forego the basalt dragons entirely.  Also:  phase shields kick ass.

[RavingRabbid]

Least used:  (I've always found more deck than ones)
Least used card:  Skeleton (tie with Solar Buckler)
Least used duo:  / (With  / )

[the dictator]

, Solar Shield/Buckler, and / is an awkward duo.

/ .  Would that be something like mutant RoL's?

And Guardian Angel has to be the best creature to BE in terms of health (and possibly apart from devourer, which will be then twice as irritating)

I could see Dissipation Field + Lots of dragons working too.

(and how would  work?)

Well, the best creature in therms of healt for BE is still Armagio

You could also make blessed mutants (only when you are lucky enough to get deja vu )

My list:
Least used element: Death
Least used card: Solar Shield
Least used duo: None, I am trying all duo's now, with the new pendulum cards. But I am afraid I fail at  / (at least unupgraded, upgraded will be of course chaos powered wings)

[teffy]

  /   Owl´s Eye or Thunderstorm + Maxwell´s Demon = possible good Creature Control.

  /  is hard maybe Nymph´s Tears / Nymph Queen + Time Pendulum + Nymph´s Precog. The Nymph´s stats are not bad.

[Essence]

Specifically in PVP?

Least used mono:

Leased used duo: /

Least used card overall: Skeleton.  Duh.

  / (Earth mark) is actually quite strong if you play a Gargoyle/Nymph's Tears deck to get Dark Nymphs to LS the Gargs.  Combine that with some Pests, and use your spare Nymph's Tears to kill enemy pillars (and then your Dark Nymph to turn their new nymph into a 1/2 Vampire), and you can slow them down immensely while beating them down with huge vampire Gargoyles.  I've done this quite a bit.