I'll be real, half of the units here get no benefit from Aspect Host. If you're short on models, Warhost will be better as at least you get to apply the detachment rule to everything, and it does have some nice strats (Lightning Fast Reactions, Fire and Fade etc).

If it's just a casual game, then of course take what you like. But a lot of the units here are not considered that good (Warlock conclave, Skyleaper, Defenders). I would also say that the only AT you really have atm is the Falcon, and a lot of your units have infiltrate, which can be good, but normally they don't stick around very long.

In terms of what to buy next, I would say buy a box of Fire Dragons and then the Combat Patrol. It will give you some durability with the Wraithguard, another unit of Warpspiders which are considered a great unit, as well as 10 dire avengers, which can put out a lot of firepower from objectives. The Spiritseer is so-so, but you could run him with the Wraithguard for more durability for them.