Indeed, it does depend on what your enemy is fielding.
For a heavy capital ship fleet I recommend:
2 -3 Kortuls
1 or 2 Skikantra for repair and air support
4 Vulkoras Desolater - not for the planet bombing, but for the large phase missile firepower. (Notice that the ability phase missile swarm does not bypass shields, however the primary weapons do.... and as such do tremendous damage, even to high level Titans.
1 Antorak Marauder for enhanced mobility and later on second way to stabilize phase space.
1 Evacuator.... jump in... bomb.... colonize.... STRIP TO THE CORE.......
of course combined with a Titan.
I havent used the Rankulas yet... is it useful?
How to level up the Vorastra:
Leveling up the Vorasta requires a somewhat different approach than that of other Titans. Unlike other Titans that support your main fleet you should send it out to hunt on its own. At first this does sound like stupid idea. However, you have to understand that it merely relies on unrivaled mobility for its survival, contrary to the Ragnarov (kill them before they kill me) or the Ankylon (outlast them forever and kill them with 1000 small cuts - after 20 minutes).
The Vorasta is the most mobile Titan in this game. It can outrun anything powerful enough to destroy it and it can outgun anything (unless extreme numbers) that can follow it. It can successfully retreat from situations that would have destroyed any other Titan and as such can and should be used much more agressivly.
Even more so than the Ragnarovs, the Vorastras firepower is focused primarly on the front. Combined with a slugish and slow turning ship (TEC has at least an upgrade for that) the Vorastra is ill suited for engaging enemy frigates fleets to gain XP. A skilled player will simple move his frigates behind the Vorasta time and time again.... denying it any descent XP gain. So whenever you you are on the hunt, you should focus on capital ships. Many people underestimate the raw combat potential of the Vorasta below level 6 and so they might not retreat their capitalship immediatly. When they finally realize, that besides the unimpressive looking stats the thing actually has some descent firepower (more than the Ankylon btw) they will try to retreat it.
To late they will realize that there is no running away from a Vorastra with Micro Phase Jump. Just keep on target.... tearing them down... if they phase jump and you are 20 seconds behind... dont bother.... after you have arrived in their escape system, a short micro jump will get you back in weapons range. Nail them down.... the Vorasta is durable enough to withstand a few defending units with ease.
Unless they have a fully fortified systems, there is little stopping you from killing that capital ship, unless they move in their main fleet. At which time you run.... not back home but back to their capital.... hopefully with their entire fleet in hot pursuit. While they are so busy dealing with your Titan, this is the perfect opportunity to move in your main fleet and ravage their undefended worlds. They will probably now divert a majority of their fleet to deal with your fleet. That allows your Titan to gain valuable XP against the remaining defenders and orbital structures. Or they dont. So just wait until your Titan begins to take heavy damage... and then retreat.... denying them everything.
Once you have gotten the Maw (bwt, always get the second upgrade on Level 8, nice range increase) the Vorastra in many ways becomes the most powerful Titan in the game. Not by raw damage potential... the range of the Maw is still somewhat limited. But by its ability to nullify even the largest of bomber fleet with ease, the preferred way of human enemys to deal with hostile Titans.
A Level 8 Eradica might be actually doing more brute force total damage to a larger fleet..... but it is quite powerless against a carrier fleet running away from it. The Vorasta will just micro phase jump right in front of them.... and eat them for breakfast.
