On any of these builds, you really need dual heat sinks. I think that mod is mandatory. Sure a few "joke" builds run without them. But most of us aren't running joke builds. You will fire and shut down, fire and shut down, etc. Not worth taking to the battlefield.
I don't run Atlai, so can't give you any specific advice on them, and it seems like those that do already have. I do run Highlanders though. For your specific Highlander build, I would drop the LRM launcher completely, lower the SRM's to SRM 4's, put in 2 tons of SRM ammo, and drop the ERLL's to LL's. Then fill the legs with AC 5 ammo + 1 ton in CT, place your AMS ammo in your head, and use that empty left arm as a shield arm in battle.
With 2 AC 5's, you will burn through ammo fast. I would field at least 5 tons of ammo for 2xAC 5's. If you really want to run LRM's, then take out the SRM's and put 2xLRM 5's in their place in the torso. 2 tons of LRM ammo should feed them. Here's my current 733C build:
http://mwo.smurfy-ne...5bfd371455fbb62
I'm running an AC20 myself, and running the largest XL I can cram in there. XL 325. The Highlander is slow and cumbersome, so the largest engine possible helps. Also run at least 2 jump jets. I'm running 3 on all but my 732 build. The benefit of running a Highlander is it's an assault with jump jets. The benefit of running an Atlas is one variant can equip ECM. It's up to you to decide which one you prefer.
Putting an XL engine in an Atlas is suicide. Putting one in a Highlander is risky for sure, as is putting ammo in torso, but I feel that if the side torso goes you're dead anyway, so may as well put ammo in there. Lol. You do have to use that left arm as a shield as much as possible. I would also always field AMS. I know some guys will say you don't need it, but in a mech that maxes out (top rated engine and speed tweak unlock) at 60 Kph, you can't get out of the LRM rain fast enough.
Here's a modified build with a pair of AC5's and a standard engine you might like:
http://mwo.smurfy-ne...3c3806561bd701a
You will have to watch your heat. Chain fire the 2 LL's when possible. I would prefer more heat sinks and a ton more LRM and AC 5 ammo plus another JJ, but the added weight of the STD engine has to come off somewhere.
EDITED for typos
Edited by OldOrgandonor, 01 February 2014 - 07:32 AM.