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As other have already pointed out you need a tougher ground presence. Hiding a couple of Wave serpents and bikes in cover with DA inside until turn 2 with the Autarch and a unit of bikes coming on with him in reserve sounds solid... But I wouldn't be so certain that Tau Skyfire would be as much as an issue as you think, remember by abusing vector dancing you should be able to stay out of range or have too many units to deal with.
That said I would be tempted to run all three Interceptors individually to avoid skyfire spilling into the squadron, and also to give them some more mobility, as a result I'd get rid of the bombers... my personal opinion but I've never been impressed with them (heck I'd be willing to run double Crimson Death formations)...

For more durable ground presence you should definitely grab a load of ranger squads, they can get good cover saves but also infiltrate which could be useful for getting them into positions where its difficult for the enemy to attack them or even having your opponent end up forgetting they are actually there if you hide them out of LOS of your opponent