IMHO a tyrant should be given a
HVC and
LW+
BS. Especially if he`s walking. 3 guard seems too much for me.
The prime i use gets
LW+
BS occasionally
AG but thats it.
My own 3 zoans will be getting tried in a pod soon. I find they dont last too long as there a big threat and get picked on a lot.
Hive guard are the stars of this whole codex for me but again you just got to have 3.
Stealers are the go to guys in this book for
CC for me. I usually run 2x10 with lords
Hormagaunts need both biomorphs or there not worth taking at all i found.
Termagaunts get devourers from me or they aint worth takin, again.

I run 2x15 with
devs and they are amazing for me everytime. I recommend this to everyone. If you want borer gaunts get a tervigon to make them for you for free.
Warriors for me are a conundrum. I love the models but i cant seem to get how they work. I have just built 3 with
BS and 1 Barbed Strangler. I`ll use them as a bodyguard for the prime and see how it goes.
I run my fex with
HVC and 2xT/L
devs with B/L worms. He`s done me well in the last couple of games i`ve used him in.
Trygons are amazing but for me you have to make them primes. I have one but i aim to get another and soon.
This is how i run my own units and i hope you can take something form it. Cheers

K