Anvil Siege Force is a great looking detachment. Plenty of buffs to range attacks as well as durability.

Las Fusil Eliminators have been very good with this so far for me. I'm going to try and use Repulsor Executioners and Gladiator Lancers with this detachment as their laser destroyers have the Heavy keyword. I have tried Eradicators but with their short range they can't really make use of the ability. They have to keep moving just have something in range to shoot.

Did you see the dataslate balance patch? Desolation squad gets 5 models rather than 4.

Just a quick heads up and correction, the Apothecary Biologist gets 9OC when the unit it belongs to KILLS an enemy unit in combat, then the model receives 9 OC the rest of the game. It’s way better than needing the unit to die first. Aggressors will almost always do this, especially if dropped off via land raider.

My current list for them is designed off the units I liked and bought when 10th rolled out: 1x termie chaplain [for knights] 1x deathwing strikemaster [for command squad] (pairing the 1cp for sustained with lethal) 1x lieutenant with combi [point scorer] 2x phobos lieutenants [for eliminators] 2x 5 heavy intercessors, 1 h bolter each [good wound soakers and 30" guns] 2x 3 eliminators, w/ las fusil [forward deploy, each paired with a scout sniper squad] 2x 5 scouts with sniper rifles, 1 launcher each [Legends but thats okay] 2x 3 suppressors 1x5 deathwing knight [in landraider] 1x 5 deathwing command squad [deepstrike and 1x cyclone launcher] 1x landraider 2x ballistus dreadnoughts Good forward deploy and 12" no shoot bubble keeps the sniper boys alive. Snipers clean infantry and commanders, while eliminators destroy light vehicles. Suppressors hose any 2w targets or anything i wanna give a -1 to hit. Termies deepstrike into wherever they'll work. Landraider and two ballistus mop up heavy vehicles with lascannons and the launchers can be more anti tank or 4d6 of ant horde. Knights break anything they can in melee, charging out of raider. Lieutenant sits in a far corner and scores, while providing free wound rerolls against one objective i know ill fight over lots