I can hold my own in PvP, but Traps is liable to be a little bit better - plus coming from */Dark you'll appreciate the Traps toolbox approach more than FF's two trick-pony.
although traps is great at pvp it can also be your undoing if you get confused since all those traps can blow up in your face. Forcefields on the other hand have the ever so lovely detention field, personal force field and the force bubble and has the best mez defence of all the mastermind sets which always makes a difference in pvp. Also the synergy with mercs and forcefields is pritty good because you can keep your foes at range, just the way your mercs like em 
Go with Forcefield i'd say, Traps is fun, but it kidna relies on them coming to you so unless they're a scrapper, blapper or tank (Or silly enough to get TP'd) then you're pretty much out of luck
Forcefield however has some real gems in it, and a Cage too which while hated for PvE is an absolute godsend for PvP. After caging a Blaster about to nuke your pets you'll agree, trust me 
Oo Ok thanks for all the quick replies 
Now im not sure whether to choose ninja thugs or mercs lol after ive read a few posts your views on that please ?
Thugs/FF.. insane damage, insane defence to your pets.
Merc/FF.. trow napkins, nonstop 1-1-1 DoT's
50)Sinergy X/(50)Mika.
(50)MaceX/(50)Encore
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Mercs have some crowd control and at 32 plenty of cone damage. They're much, much tougher than the other pets (Smashing/Lethal resist of around 30% on all your pets, yum!) and I really notice it as they tend to survive far better than my other MM's under heavy fire. The Medic can prop up FF lack of healing, but don't expect much. Choose Mercs if you want to make the already tough FF even tougher, but the damage will be fairly low.
Thugs have a bunch more damage, but they're a bit squishier than Mercs. The Tier 3 Bruiser pet is a melee damage machine, although a bit difficult to manage as you need to tell him to move about to bring him to bear. With Thugs you get your own tank, as the bruiser is just that nails, and they got some nice AoE although the Arsonist while die a lot. They're a great choice for damage without the need to worry about melee much.
Ninjas are the highest damage of the three, but they're also the squishiest, FF can cover some of this due to it's defensive nature but still expect to see the poor genins to faceplant a good bit, all but the Oni does the most damage in melee and this can be annoying but get them in there and damn do they rip things up. The Oni brings a bunch of control to your character, and smokeflash let's you really turn on the damage with him if you take it.
So if you want to be the toughest of the tough and some extra control, but putting out fairly low damage numbers go Mercs.
Want to have good damage, and be less squishy than ninjas but lacking the controls go thugs.
And if you want high damage and control, but fairly squishy minions go Ninjas.
's what I like about MM's all the pets have thier own styles!
Thugs aren't squshie! Slot enforcers for defence! Then you'll see thug power!
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Thugs aren't squshie! Slot enforcers for defence! Then you'll see thug power!
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They're squishy in comparison to the nails that are Mercs
Well I'm making a Mercs MM but not sure which secondary to choose
I already have lots of chars with DM so want to try something different, I will be PvE mostly and usually in teams if I can but I would like to be a tad good in PvP also but it doesnt matter that much
So your wise words will be much appreciated
Thanks