This is eating up 1/3 of your points. He is unlikely to see action till the later turns in which he is unlikely to be worth it for such a huge investion.
id suggest cutting down to 1 guard and try for iron arm.
2 units of 20 Gargoyles with Toxin Sacs
seems fine
3 units of 19 Genestealers and a Broodlord
Genstealers are very expensife for what they do, their saves are terible so they will have a hard time surviving up the board. The swarmlord makes themm a bit better but not enough.
Even if you get themm into combat they usualy won't perform great. Infiltrating themm is risky as they can;t charge after and will be vulnarable for the turn.
22 Hormagaunt Brood
Furfill mostly the same job as the gargoyles and feel kinda redundant at this point, without upgrades their punch won't be great enough either.
The idea here is that the gargoyles screen the infiltrating genestealers while the guants screen for the swarmlord. The Swarmlord is the only answer I have for Land Raiders. Its got a 126 models in the list.
Anny form of template or mass numbers of shots is going to devestate this due to 5+/6+ saves, Its alot of models to shoot down but they will get thinned out before getting where they need to go at which point they are unlikely to have the impact needed to turn things around.
A fragile assault list like this is yust unlikely to work in the shooting edition thats 6e.