LVL 1 Ankylon vs. a few early-mid TEC spams, with a limit of 4 Mil. research labs per team (required for titan). All research up through T4 is done. I've found that starting with armor/heal and 2 fighters is always solid, but you can substitute one of those for matrix if you're willing to trade some tankiness for a little more killing oomph.
VS. LF: Can handle 40 LFs (200 fleet supply, FS henceforth). Not much to say. Basically it's a free meal, and other things are far more effective.
VS. LRMs: Can handle up to about 30 (115 FS) LRMs. It will level up during the fight, so be sure to watch for that moment. I suggest taking matrix and gunnery, as they help quicken the killing pace.
VS. Carriers: Can handle 10 carriers (140 FS) or 20 bombers, starting at the end of the grav well. It will level TWICE when fighting them, so pay attention and grab your skills as they come.
VS. Corvettes: Can handle 40 Corvettes (120 FS). Too many more than that, and it becomes a toss-up between who wins. The Corvettes give such low exp that even 40 of them won't lvl the titan, so this fight is harder in the long run than the others.
VS. Gardas: Can handle Over 50 (200+ FS) Gardas with ease. Here's a tip: Don't feed the titan. It will lvl twice, as well as kill over 200 of your FS should you decide to stick around long enough. If, however, you do feel like pounding on the beast with flak, bring about 100. You'll lose 25, but at least it'll go down (if it starts as lvl 1).
As soon as I can get some Cap. Ship Info, I'll include those in my tests. I need to know about what lvl a well-fed Cap ship would be when the first titans started rolling. I'll get to some of the other titans tomorrow, and possibly do some diversified fleets.