@Icewraith
First, I must point to my other thread about my mistake with SRM chances.
About your 1xAC20+++ 2xLL #xSRM#, if we assume a 1xAC20+++ 2xLL+++ 2xSRM4, it runs cold and has decent armor (with TEX/DHS), but why don't go for full LL range? you get similar performance from a 4xLL+++ 2xAC2++ as a base, allowing you to replace one or both AC2s for AC5s, depending on how aggressive you play.
For the Cyc-Z I do the same, LRMs, so JJs are not so beneficial and you barely generate any heat, even firing all the time, and can sometimes work as a finisher for very badly damaged foes.
The point you make about being hard to get a full stack of MLs++ and SRMs+++ is quite a good one. You only need two ++/+++ weapons for a fully armed dual AC20. And in addition you need TEX/DHS for a good performance ML/SRM Stalker.
@smurfopax
As before, first point to my mistake, to recognize I've been fooling myself XDDD
Now you comment, that otherwise I'd overstep due to lack of evidence or stats, makes much more sense to me. If you have two salvos available the Stalker is not so good as I thought but still is pretty good. And for CT core there is no comparison because the issue is mostly about lack of damage when dealing with full armored heavies and assaults. And besides that, more damage is super useful against turrets and vehicles. That's why LRM boats with +2 dmg are the best for that role, because they have indirect fire and very long range but also because they do a ton of damage.
I think the AC/20 LL Atlas started off as an experiment as an alternative to the 2x AC/20 build. Also I have terrible luck finding ++d ACs in the 2/5/10 range.
Have you run numbers on a 4LL++d/4SRM2++d Stalker? (Or KGC I suppose) Might be headshot king on no DR since you only need one of each weapon to connect, not sure how it scales with DR.