KFX-D "Little big moneymaker" (1x cERLL, 1x cLRM20, 1x JJ, cECM, TAG)

cLRM20 and cERLL have approximately the same reload rate (cERLL: 2s duration + 3.25 cooldown = 5.25s total. cLRM20: around 0.25s duration + 4.75s cooldown = 5s total), which means they pair quite nicely. And as I often say, if you have to keep line of sight while tagging and firing LRMs you might as well fire something else too.

This is clearly a support mech, but its real purpose is to make you money. To that end, you should play it as I described in these similar (in spirit) Jenner and Commando builds. Do not run around with TAG always on, as it will give away your position. Also, this is nowhere as agile as those IS mechs and short-range it's quite terrible, so always stay close to your team.

Alt A: MG for close-range defense, downsized LRM:



Some results:



http://i.imgur.com/arcTIjn.jpg

 

Mmmmm, grind-tastic!

 

I think the second version is better, because machine guns can really make the difference at the end of the game or during a brawl and help your team to kill the opponent quickly.

A other twink of your build with ERLL could be to add a TC1 and downsize the lrm from 20 to 15.