I'm not a fan of frontal deflectors. The tech is what, level 5?
And the total damage reduction is 25% from the front only* for the price of one upgrade.
If you do the maths, you will see that getting 3000hit points , 3 armor, 1500 shields AND increased hull and shield regeneration is always preferable to having 50% frontal-only damage reduction active every second minute.
The idea is very good, but it is simply not worth it.
If the shield deflector could protect the starbase from one target only, but instead would keep 50-60% of the damage away over the whole fight, now THAT would be good. Anti-starbase - ownage. Anti fleet - shit.
OR the deflectors could be replaced with an ability that would cause the enemy target do 25-40% less damage globally. That way, a 1-defense Orkulus with this ability would be a perfect soft counter for a starbase, because it would protect its fleet as well. Having no torpedo cruisers, the Vasari player would field an Orkulus and give this ability to it in order to protect its supporting fleet and let them do the assault role without being annihilated too fast.
Anyway - rite now, it sawx.
Of course, once you get all 4 armor upgrades, you might get the deflectors for even more damage reduction. But then, your starbase is doing nothing. So you have to buy assault system upgrades.
Bam, there go your 30k creds, 25 minutes and all that for a brick that is now finally capable of killing that enemy brick over the next 20 minutes.
Awesome.
* - a red 100% damage reduction in game mechanics means that the damage is divided by (1 + 100%) = 2 , which results in the damage getting halved. However, deflectors are active only for one minute and then inactive for another. The effect is 50% damage taken 50% of the time and 100% the other 50% of the time => simple maths tell it sums up to 25% damage reduction.