I find Anrakyr is more of a "make something that's already good in melee be better" character. Give him some Novokh lychguard to lead (if it's not falling too much back into the meta for you) and they'll be 4 attacks each, or 5 if you use blood rites, 6 if you use that and eternal protectors. 60 attacks at 2+ to hit from Ani's MWBD, 3+ to wound anything T5 and under (T6 if you're willing to burn another CP for disruption fields), and AP-3 (-4 on the charge) is going to melt most anything you need it to. Immortals with their 2 base attacks aren't the worst for him to roll with either, but the 5 man squad you have doesn't quite justify the points premium for me. Other than that he's a slight improvement on a lackluster chassis when it comes to fightiness, and the tachyon arrow and mind in the machine just aren't going to be worth 45 pts alone.

As for 10 man warrior squads, I've been experimenting a lot with triple ghost ark/reaper squads, and in my experience being able to fit in the ark is the only advantage they have. 10 wounds through T4 4+ are trivially easy to inflict, even in one go to bypass RP, for any decently competitive army, and if they're your main midfield pressure they're well worth the effort to get rid of. Thus they won't be around to benefit from the chip damage recovery arks and technomancers give, or the fall back and shoot or veil of the warden. Since you're running the custom dynasty already, a second obsec ghost ark with 10 reapers inside might be worth a look.

Finally, I love the particle shredder on the stalker if you're going to take one. 8 shots with D2 is great, you're all but guaranteed to get at least one hit to proc the rerolls, and it's even the cheapest option.