Just for those who've been asking while I work on getting settled back in and cracking up a full report, the 1850 list I took to the GT was ...
Straken w/ 3 Melta, 2 Bodyguard, Carapace, Medic, Chimera (ml/hf)
4 x 3Melta, Shotgun Vets w/ Chimera (ml/hf)
2 x 3Melta, Shotgun Vets
3 x Solo Vendettas
2 x Solo Demolishers
Beat fairly optimized: TWC / wolf lord + lasplasraz + longfang/runepriest wolves in a KP mission, leafblower (manticore/etc.) guard in a "capture terrain pieces" mission, and MSU spammed guard in a 3-objective-with-one-primary mission
The thing about the list is that against things like tricked out wolf lords, it can melta / gun them down via torrent once they get close, and prevent favorable charges, all if the demolishers don't do a number on them via a failed 3+ invul. Meanwhile, Straken's squad can annihilate units like grey hunters with impunity, without even taking significant damage. Plus, after 2 guardsmen die, according to INAT's FAQ specifically by this very example, units are swinging to hit them via WS5. Silly.