@gyedid - well yeah. Exactly. LBX/10s and Gauss are absolutely no contest to Clan energy weapons.
They are good supplements though. Look at the Daishi Hohiro. ER-PPC, 3 LPL. Ideally another ER-PPC would round it out, and it has the tonnage; what it doesn't have is the critical spaces to install the second PPC and associated heat sinks. The Gauss is a good enough compromise; it eats a lot of tonnage, but not as much space, and has performance that is only slightly inferior.
Another would be a custom kit fox; ER-LLas and LB-10X. The first one can punch holes in anything 30 tons or under, and then the second gun sandblasts the gooey insides, while still running Heat-neutral.
Looked at in isolation, yes, clan LB-10X suck, and clan gauss are subpar. But as part of a whole, they can be pretty acceptable. Is a LB-10X worth giving up 3 ER-ML and associated heat sinks? Sometimes. Not always, but sometimes. And sometimes you just don't have the crits free for those heat sinks, so you slap in the LB-10X.
The ultra 10 and 5? Those I have a much lower opinion of.
