Normally using clan mechs, but i love Atlas since Mercenaries, so i decided to buy and lvl this one for collection(D-DC because of ECM slot, in firstplace).
Every time i see an Atlas with LRM's, I die a little inside. Maybe this build actually works on lower tiers, on higher ones only as a drop for a laugh. Sorry for being critical and not exactly constructive but wasting 100 tons to stay behind your team is actually not the best way to utilize this tonnage.
or, to look at it from the positive experience, PUG's. They will out run you, and until you can catch up, having SOMETHING to add to their damage always helps.