Let's talk about the Snake 1V (
http://www.sarna.net/wiki/Snake)
45t, 5/8/5, 7t armor, XL engine, LB10x w/2t ammo, 3x SSRM2.
Purportedly an elemental hunter, or an IS BA hunter... it really is not great for its intended role. The LB10x is a solid weapon no matter what, but that triple SSRM2 is poor. And then... double-heat sinks, for something that jumping and alpha striking makes... 13 heat.
As a vehicle hunter it might be decent, but it is fairly weakly armored, and again, it is wasting a bunch of tonnage on 3 SSRM2s, which isn't great when trying to counter battle armor or elementals. You could mount a pair of SRM4s and increase the armor by 0.5t, which would let you mount infernos
LB10X platforms in light mediums are tough, but this one just isn't as fast as others, the secondary weaponry is lackluster, and its "role" is one it is not good at.
Compare against the other "elemental hunter" battlemech, the Komodo. Also 45t, also 5/8/5, also XL engine. But the Komodo mounts 10 medium lasers, TAG, ECM, 2xAMS (and 2t ammo), and 7.t armor. So it outputs way more damage, it can spot for many things with the TAG, it can shut down hostile electronics, it can swat down elemental SRMs, and has more armor. The snake just pales in comparison.