I got level 95 very fast by killing Titanosaurs. The best way is to use a lightning Wyvern and fire it from above, watch your stamina. You can also use a very good Giga (good melee and good saddle is a must) to kill it fast, try to hide behind a Redwood tree, take your time and watch your stamina. If anything goes wrong (Giga stuck in a tree) dismount from it and shoot arrows at the Titan, it will start chasing you, hide behind a tree and wait. The titan will become passive. Good hunt and don't forget the broth for exp x2 ! :)
The "end all" raid dino. Be noted however you CANNOT TRANSFER IT across servers like other dinos, so for the 24 hours you keep it, either raid the tribe(s) you dislike, or do what we did and foundation wipe old structures to clean up the map.
My tribe tamed one of these for a raid thinking it would only last a day cause that's what all of us have heard. It's now been almost 4 days and is a little under half food. We're playing on official too
Simplest way to use is aggro them from a flier, and lure them over to the base you wanna raid. Their turrets/plant x will make it attack the base, and destroy everything for you. I have watched many bases on my server fall this way!!!