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The swarmlord can't take a mycetic spore- due to this, you may decide the Swarmlord footslogging across the field is too tempting a target. You could trim back some points and get a regular Hive Tyrant, or another Tervigon.
Zoanthropes are great, as is Deathleaper.
I think every list is going to have at least one Tervigon in them now.
Genestealers- do you really NEED toxin sacs? their strength is good enough to give you the same benefit against MOST infantry (just big things will give you trouble.. but Zoanthropes can take big things down).
Basic termagants are great, you'll be making more of course throughout the game. Hormagaunts may need the toxin sacs if you're fighting MEQ's most often.
Trygon Prime... love him.
Other suggestions: mycetic spores with cluster spines are GREAT.
Imagine a unit of ten termagaunts coming down in a cluster spine Mycetic spore, all armed with devourers...
A concerted effort between a Hive Tyrant and a Trygon Prime might do VERY well... especially with those Hormagaunts which could outflank due to the HT's rules, and pop in near a synapse creature due to the deep striking Trygon Prime.