Well, I just used the Revenant Titan for the first time in normal 40k. It was pretty hilarious.

Ultimately, I lost the game. However, the Titan caused a hell of a lot of damage. I was facing off against Optimus Prime Time's Farsight Bomb. My list was as follows:

Farseer
Farseer
10 Guardians in a Serpent.
2 x 5 Dire Avenger's in Serpent's.
3 Jetbikes.
Revenant with Pulsars.
Skyshield.

The Titan sat on the Skyshield for a 4+ invul save. I got seized against but first turn was mostly out of range shooting on OPT's part. The Broadsides tried to punch a few holes in the Titan but failed to get through the multiple layers of protection.

My first run arrived and I threw Fortune and Guide onto the big boy. He shot at the Bastion holding the Broadsides and, unsurprisingly, detonated it. Nothing else was in LOS so the serpents just moved around a bit.

The big moment had arrived. OPT landed his bomb, which was loaded with Tank hunting Missles and Fusions, right in front of the Titan. However, even after re-rolling to hit, Markerlight support and Tank-Hunters, nothing got through. The Holo Fields alongside a 4++ re-rollable save stopped at least 15 shots. OPT then Jet packed under the Skyshield to hide from the Death templates (The Titan is big, so gaining LOS to units under the skyshield can be a bit difficult). 

I jumped the Titan 36" to the other side of the board so I could blow apart the remaining Broadsides. The rest of my shooting was fairly useless, taking a handful of wounds off the bomb and being left in a huge disadvantaged position.

OPT's third turn saw him pretty much destroy the rest of my army.

My third turn saw me jump 36" and kill a handful of suits (No guide on this one unfortunately). I failed my charge though :( lol.

OPT took some more shots and proceeded to charge my Titan. Stomp only killed one suit, but it was enough to force the entire bomb to fall back.

My final turn saw me shoot a few of the leftover suits and attempt to force the Kroot off the objectives. I failed and the game ended.

Overall, I think the lesson is quite clear. Whilst the Revenant is a huge killer, it does cost 900 points, which leaves you with very little breathing room in the rest of your army. If your opponent manages to wipe out whatever troops you have left, then the game is all but over. 

Next up, trying it with the Sonic Lances!