I disagree. I just played a game where i used 5 Skirmishers and a Skirantra to clear my first five planets (Yes, it's a capitol, but doesn't even equal 3 Skirmishers in firepower and was only targeted in one grav well) And i didn't lose a single Skirmisher to that endeavor.
Against the AI, or a sucky human who will give you all the time in the world, you could have done the same with a skirantra and one skirmisher. Hell, you could have done it with the skirantra and a scout.
They are weak, so use ships that can heal them, and research Reintegration.
Reintegration doesn't come until late.
Advent have only the "Subjugator"
They have the mothership as well, which heals shields (in most cases, a better ability than healing hull), and a shield cruiser as well.
while the overseer...
First point, the overseer comes very late in the tech tree. Second point, many people (myself included) believe that the overseer sucks balls. Oh sure, the abilities you list sound good on paper (reactive armor, blah bla), but in truth the thinigs require way too much micro, they turn as slow as mollassass in January (which affects their ability to heal), they drop like flies in any gravity well that has fighters (I learned that the hard way playing against Cykur), they are expensive, and they require 4 labs to get. Juxtapose that against the TEC hoshi, which requires no micro, isn't affected by turn rate because it heals unidirectionally, is cheap, and requires 3 labs to get, and you will see that the vasari in every way are saddled with an inferior support cruiser that is more expensive and requires more tech labs to boot.
making it a good ship to rely on.
I'd like to see you try to rely on this ship against a quality human opponent.
... so the people whining about not being able to Skirmiser-Rush need to take a look at what their saying, exactly. Perhaps that is why it only takes two weapons labs to build LRFs and Flak?
Well I agree the unit shouldn't be balanced around the idea of a skirmisher rush. Arguably, however, it might should be balanced around defending against other races' light frig/scout rushes. Also, it needs to be able to counter what light frigates are supposed to counter (carrier cruisers, support cruisers, etc). In the past, I have had a significantly difficult if not impossible task countering such cruisers with skirmishers. Now... I'm open-minded enough to accpet the idea of a skirmisher that can't do anything, provided there is some "racial balance" somewhere which balances the vasari out. But the racial balance certainly isn't to be found in support cruisers, lrf, flak, etc.
I do think the vasari superweapon is better than the other superweapons (things you will rarely, if ever, see in an online game). And phase stabilizers are great. But I'm not sure that these aspects are good enough to balance out their poor ships.
Returning Armada was nerfed too much. Buff that, and we may have more "racial" (vs. unit to unit) balance. People would have a good reason to play vasari. They could say "yeah, it's a risk, and I may be down early and midgame, but if I can make it to Returning Armada...." I have to admit, those were fun days.