Reply to Latency / lag time

Hi Folks

new problem looking for solutions.
any help is appreciated.

got traktor 1.2.7 / mac book pro / hercules RMX custom mapped.

using only 2 decks but with the 4 effects processors

when all 4 effects are pushed to on within the mixer or when there seems to be too much going on, i loose latency and you can visually see the lag time when using controls. i'm not sure why.
in the Audio set up settings my latency is 11.5 ms

last evening i decided to map one more beat phase monitor LED to pulsate with the beat, suddenly i was faced with MAJOR lag time. when i took that LED back off everything seemed fine.

I am looking for a fix

thanks
Dax