When I started out I mis-used every kind of unit horribly and was unable to find uses for the weirder unique units for quite some time. I didn't find any advice on their usage on the forums or wiki. I thought it might be cool to put together a community thread of your unit stratergies and tactics that can later be raided for the wikipages.
I would especially like to see some advice on getting the most out of:
+ dreadnaughts
+ spider bots
+ Anti-armour ships
+ Cutlasses
+ Vampires
+ Zenith Sentinels
+ Zenith Mirrors
+ Riot Starships
+ Infiltrators
Shield Boosters
My favoured start unit. If stacked can boost shields of surrounding allied units by upto 5x!. This isnt so important used with fighters or frigates, but with starships, space tanks and especially bombers it is off the chain. An MkII bomber has 1500 shields; an MKIII has 3500. However, a Shield Boosted MkII has 7500 shields, and an MKIII has 22500; I dont think I can stress enough how much tougher that makes these units!
My starting strat is heavily focused on speedy expansion and progress, on the logic that time wasted = more AI ships on adjacent planets. To this end, I tend to focus exclusively on DPS: Fighters and bombers only, mostly bombers.
I unlock:
Transports
Bomber mkII
bomber mkIII
Shieldboosters make the high MK bombers a great deal tougher and more effective, just place your units in a tight formation, set them to move at the speed of the slowest unit, and fly around in a tight group. Your bombers now have space-tank shield levels, only with 10x the HP!
For fast progress, I tend to put the 15 shield boosters into a transport with as many high MK bombers as possible, and fly around dropping them onto enemy gaurd and spec ops posts untill the planet is clean, then moving onto clean the next planet. Transports take damage moving into systems without supply, and your bombers only unload 10 at a time, but if you load up the shieldboosters first, they will be the first to unload (they then have the equivalent of 22500 shield, so they will likely survive until everything else has unloaded). subsequent unloads will enjoy the high shielding levels. demolish the target, load up again, and repeat! All the heil the shieldbooster!
The weakness of the shieldbooster is you will have less unlocked combat units, and little or no boost to your ability to combat fighters. Also, at only 15 extra vessles per unlock level, you might find yourself lacking in combat units to produce, forcing you to spend more of your knowlege to unlock units. You might find yourself somewhat envious of an ally with his vast fleets of microfighters!