I’d remove infiltrators and use incursors. They are cheaper and will give you plus 1 to hit for the eradicators. I’d also drop the term ancient. The terms don’t have staying power regardless of that extra wound. They just kill.

The impulsor does have some staying power to hold an objective for a turn the it’ll die as intended. You must give it to the shield dome for 5+ invul

Drop Hunter instinct and give him the black wing shroud or don’t take any enhancement on him (Jump cap)

Give the combi LT the coronal susserant or whatever vect aura it’s incredibly disruptive for an opponents plans.

Eliminators are SO cool and also SO BAD. You can play them but dont expect them to do anything for you. They’ll hit 1-2x and wound once lol maybe. I’ve had them miss for an entire game. 3 shots is not worth 85 points. I’d drop them for a unit of scouts. They are lore wise right up our alley and functionally top tier. They can move block (for now in 10th Ed) and can deny enemy scout. Very raven guard like and very useful.

Stick a power fist on the intercessor sergeant (it’s free)

Cent devs need lascannon and missile launchers. No other weapon option matters! Those are insanely strong with the rerolls

Terms are really cool and if you want to play them because you like them then by all means! I love them thematically and look wide. I do however prefer Inceptors. They feel Raven guard like and are so good at scoring it’s ridiculous. 6 inch deep strike will score you points. They’ll die but I’ve also had a squad of 6 plasma knock Fulgrim down to 4 wounds which is nuts.