Alright, man, I'm going to give you the crash course of mechs.
You've got a hybrid. What that means is your atty is making a direct connection to your battery. Considering that you haven't blown yourself up, your Plume Veil has a protruding positive pin (the little thing on the bottom that hopefully sticks out of your 510 threads). The advantage of a hybrid mod is less voltage drop. So, its weird that you're having so much lag.
I know nothing of your battery. If you know the CDR (continuous discharge rate) then it could be very helpful to know what resistances you can build to. I'm hoping its a rewrapped 20 amp CDR.
Some tips:
Get an ohm meter. Eleaf makes one for ~$15.
Buy genuine batteries from reputable dealers, such as RTD Vapor and Illumn.
Never let your battery/batteries drain past 3.5-3.6 volts.
Know what you're buying.