The Best IML Sub that you have used

[Shannon]

Stand-alone DRS: instant life changer for someone who was constantly under attack.

Edit: I’ll expound on the results - First it almost killed my no. 1 nemesis, then, once she recovered by sucking life energy out of somebody else, it made her so eager to please it’s almost unbelievable (e.g. ‘Oh, I just wired 10,000 to your bank account just in case you need some money’ )

I still use it from time to time for a short time to boost the built-in DRS in LTU, mainly when I have to interact with nemesis and, sometimes, other toxic people.

Im currently using OF but youre making me want to 'supplement' it with stand-alone DRS.
Can one do that and if so how?
Will it reduce OF execution?

OF has DRS in it.  The whole reason stand alone works better is that it is stand alone.  It focuses completely on creating the DRS, and nothing else.  As you divide focus, you also divide attention, energy and resources, which results in a less and less obvious DRS.  Just do OF and when you're done, you can play with DRS stand alone.  There is no way around the fact that running both will degrade the performance of both.