The Scathis' range has been changed from 4000 to 350, but I cannot find when then the change took place (not listed in the patch notes on the wiki).
This change removes the only long-range (ie. map-wide) weapon that Cybran had (non-exp. nukes are too easy to defend against at the later stages), making them unable to compete in late game against UEF (novax/mavor), Aeon (Salvation) or Seraphim (Exp. nuke). Once a faction has one of these up, they can switch to 100% defence, whereas Cybran then need to split their resources between defending against it and attacking. It's obvious that unless the opponent makes a massive mistake, there's no real coming back from that position (please don't suggest "don't let them build it", as that is not balancing) It is not uncommon for those experimentals to be built in the more "friendly" FFA games on 20x20 maps and larger.
Furthermore, at twice the cost of a megalith, what role does the scathis now fill? It's still not going to get built on smaller maps where it is actually in range of anything, and on larger maps if you have to get that close to a base, 2 megaliths will by far be almost always better.
I suggest reverting the range to 4000, and balancing via cost/weapon damage to make it more worthwhile.