Like I mentioned, I really enjoy your site.
Here is a strategy I like to employ.
Nav+Assassin Bully
Obviously, if you can add a pirate to this, it becomes much more devastating, but to all of us who aren't blessed with all 3 specialist hires from the get go, this is a great combination to chase an opponent around with.
The main thing I focus on here is keeping an opponent's queen constantly on the move so A) they will not be able to charge full queen shields, B) it will significantly delay when they can actually hire specialists (as the queen must be at an outpost), C) Makes opponent focus on protecting their queen while you poach their other outposts.
The key for me here is never to actually land at an outpost, as your opponent will typically be moving around his drillers to receive and capture you upon your arrival, but just keep redirecting to where their queen is at/ is going.
Obvious counter for this is a pirate, but as long as you have vision of your opponent's queen, you will be able to anticipate the hiring of the pirate and get out of there before they retaliate.