I liked the previous poster's suggestion of the CIB, but I disagree about upgrading him to a Shas'O.
I strongly favor the TA upgrade instead... saves a good bit of points (especially important in low point games). You also don't need Target Lock as you cannot seperate shots of just 1 unit (Target Lock lets 2 different units that are together spread out their shots... but each unit has to fire at 1 target). And since this is a small 800pt game I would dump the drones too. If you want to add a little survivability without making your HQ a point dump, just add Stims.
And an absolute must... Multi-tracker & Disruption Pods on both Hammerheads... absolute must. As far as I'm concerned they should just come as standard equipment.
And if bikers are a big worry of yours, I would make my list a lot more mobile. Between your 2 un-mechinized FW teams and your Sniper Squad, you are very static. I would suggest dumping the Sniper Squad and maybe adding a Devilfish w/Dis Pod to one of those FW squads. Ideally you would like to Mechanize both FW teams... maybe instead you could switch one FW squad out for a decent sized Kroot squad. With infiltrate they are a hair more mobile and they are definately cheaper.
Maybe, if points magically materialize from savings it would also be nice to add a Crisis suit for more firepower & mobility.