This is a weapon loadout that I've seen Jagers run to great effect. The AC/2s line them up, while the AC/20 knocks them down. Well, that was the idea anyway. The build just doesn't quite work with the Ilya. You'd think that the 5 tons the Cataphract has over the Jagermech would make this a superior build. However, Ferro is not substitute for the weight savings of an XL, so I had to sacrifice backup weapons heatsinks to even field this build. If you put a STD-275 into the 'mech you can bring the armor to near-full (but I've never lost a leg nor suffered a decapitation). If you put a 270 in, you can also put in a MLas, TAG, SPLas, or an extra ton of ammo.
