Here is what I have been playing around with.  I am not sure which builds I like better and I am also not sure about placement of weapons yet.  For example do I want my LPLs in the arms or in the torso on the 4R?  I am trying to figure that out.  
 
The only thing I know for sure is I do like the speed and the JJ's!  The other thing I think I know is that these work better with an XL Engine.  So far I have not noticed much of a difference in survivibility when going with a STD Engine.  Probably because in those cases when I am still alive at that point my arms are gone along with most of my fire power.  
 
Here are the builds I have been toying with, so far I am experiment with weapons that take advantage of the quirks only. I did not configure the armor exactly how I like it I usually go 40/8 in the ST's and 50/14 in the Center.  
 
5D Builds:
1: 
LPL Build: not my favorite but not bad either.  I have noticed having the LPL's in the torso is way better when I have a STD 250 engine equipped.  
2.
 LBX10-MPL Build: This one is quite fun to play.  Although I am still not sure the LBX is what I hope it would be.  No reason for a STD here.  When the arms are gone there is not much fire power left.
3.
  LBX10 Take 2:  This one uses ML's in stead of MPL's.  This allows max engine size, although I have entertained maxing armor and going with an XL 320 instead.  I could also max armor and go with an STD 260, but I don't see the point cause 2ML's once your arms are gone just don't seem to cut it.  
 
5P Builds:
1. 
Single UAC5 + ERLL: Very fun build to play.  I like having the ERLL for more punch when I run out of ammo, but 1 laser is not much really. 
2. 
Dual UAC5s: Another fun build.  Very ammo dependent, and very strong until you run out!
 
4R Builds:
1. 
AC10+MPL (NO JJ): I like the build but it seems sacrilegious to not have JJ's on an Enforcer! 
2. 
AC10+ML:  This is the one I play mostly and it does really well.  
3. 
Pulse: Ths one is fun to play, although isn't an enforcer supposed to have ballistics? This one is more of an experiment, but is performing well.  I have even shaved the right arm armor off and added a heat sync, but I prefer it a little hotter.  
4.  
ERLL: Another experiment.  But it is fun to play.  
With the last two builds here I have switched the laser around putting the larges in the ST and the ARM.  Still not sure where I like them the best.  
 
Hope you find these useful? Either way feedback on what you think and like better would be great!