Posted 10 February 2013 - 02:21 PM
Here are some mech building guidelines:
1 - Never do FF unless you have already done ES and still have over 14 crits left and need the weight. Basically, only some light builds should be doing this (with a few rare exceptions; I briefly had a Cataphract with both until I changed the loadout a bit and dropped the FF).
2 - XLs are only safe on a handful of mech types: the Dragon, Catapult, Raven, Jenner, and Cicada. If your mech is one of those, then it is not a terrible idea to buy firepower by switching to an XL. If it is anything else, then unless you have a very specific build (that is extreme range and really needs the weight, like a dual-Gauss or PPC-spam build of some kind) you do not want to bring an XL along. Mechs that especially must avoid XLs include but are not limited to the Cataphract (huge shoulders), Hunchback (huge shoulder that everyone focuses, except the 4SP which still has pretty easy to hit sides), and Awesome (huge sides that pop very quickly). The Centurion is another risky XL carrier, and the Atlas and Stalker are both easy enough to blow that it isn't really worth it. Spiders and Commandos can work if you are going for full-on speed, but they are riskier than Ravens and Jenners (who have much lower side torso profiles).
Since you are running a Cataphract, avoid the XL unless you are boating Gauss or PPCs or something (quad AC5s perhaps). Your side torsos are super vulnerable.