Ya have a problem there, mate. A well-rounded bug army does not happen so easily, lol. You need Synapse or you'll perish too quickly to even contest an objective. Make one Fex a CC monster as you like, and keep him under 114pts.... He's an Elite Choice. Next, kit the other two out to be Sniper Fex's with Stranglers and VCannons. The smaller bugs can be put into units of 8 easily enough with whatever upgrades you like (I'm partial to ExtCarapace and Scuttlers on the Stealers), leaving the Hormies and Termies as they are. The Warriors can be an issue. They are currently your only Synapse, and they are quite fragile to be left in such a position. They can work well as a low-key shooty unit, if you give them a VCannon, but the likelihood is that they'll make easy targets for enemy long-ranged guns. A Broodlord, or Tyrant would be a great purchase, as would a few Zoanthropes for Synapse and spooky Str10 psyker-slime.
Honestly, any army over 500pts will give your list a hard time, simply because your Synapse network is nearly non-existent. At least one more unit will have to be purchased in order to make the rest a reasonable army.
These are my opinions at least. Cheers!