Dual Pistols/Time-take one or both control powers?

[JnEricsonx]

IE, Supressive Fire from DP, Time Stop from Time, or both?

[Apparition]

I'd go with Time Stop, because it is a Hold and -Regen.  I mean, it's not a lot of -Regen, but between that and Time Wall you have -75% Regen.

[Generator]

My vote in these situations is always "Both if it's at all possible," so that you can either stack them to take on a Boss, or spread them out to lock down two different PITA mobs.

[Crysis]

I’ve had very good luck with Suppressive Fire and the Lockdown IO set w/the +2 Mag Proc.   Lockdown set bonuses also include a very nice +Ranged DEF bonus, a Hold bonus and a few other goodies.  Suppressive also does some minor damage and if you use one of the ammo types other than standard, it also increases the Hold duration.  

[SlimPickens]

suppressive fire is also a proc monster. Slotted with damage procs it can easily go well over 300 dam/activation. I wouldnt skip it.