Unfortunately I don't PvP
However, from my understanding of PvP, N/Me would be my suggestion.
I play N/Me in PvE (Person vs Environment), so I know how good it is vs AI.
E-denial, condition spreader, enchantment stipper, hex remover, direct damage dealer, support caster, etc.
E-denial means removing enemy's energy. This means that the enemy will have little to no energy to activate most skills.
Condition Spreader - spread conditions to other enemies; conditions you receive can be sent to enemies, conditions that are inflicted on enemy can be spread to other enemies. (ie: bleeding, deep wounds, disease, poison, weakness, etc.)
Enchantment Stripper - taking away beneficial enchantments from enemies
Hex Remover - removing harmful hexes on your allies
Direct Damage Dealer - damaging enemies directly with spells
Support Caster - reducing enemy's effectiveness and/or increasing the effectivness of your party (ie: reducing the enemy's chance to hit an ally and/or reducing enemy's defenses)
This of course is my opinion.
Hope this helps.
P.S. do not use the combination of Incidious Parasite with Price of Failure or Reckless Haste. Price of Failure and Reckless Haste work nicely though. Incidious Parasite requires enemy to hit you, so Weakness/Enfeeblement + IP do go together.