I've tried out 4 Campaigns on TWW2 until now.
1- Malekith, N, until Turn 30
2- Teclis, H, until Turn 100
3- Mazdamundi, H, until Turn 40 (mostly turtled)
4- Tyrion, VH, until Turn 120
Thinking of starting one with Teclis again, this time sending his forces to Africa. Here are my views on the Game.
The Vortex mechanic is a huge shaggy dog at best. At worst, it's an active liability for your Campaign. Let's look at it objectively.
1- The benefits aren't really that great, even on VH. Except for possibly the Slann one & the Black Ark one. But even these, aren't really necessary.
2- The amount of time & funds spent on defending the Ritual sites is absurd. In my Teclis campaign, I had 5 armies- chaos & intervention- attacking sites at once & destroying every minor settlement they found. Expansion is almost impossible if you're trying out the Rituals. Simply having armies stomp up & own in your Empire's heartland is irritating enough.
3- The Player can NEVER compete with the DEs in terms of Rituals. They have few enemies, far too settlements in their continent, & confederate far too easily.
In my Tyrion campaign, I haven't performed one ritual yet- & I'm easily the dominant power in the World. DE, Skaven are at 2. Mazdamundi is at 1. But DE are a gutted remnant of what they were; I emptied Ulthuan of troops- since I don't do rituals, there's ZERO danger of having my core cities attacked, & reduced them from 50-odd cities to less than 20 within 40 turns. I allied with Teclis & that Talxa faction to nearly wipe out Skaven in Lustria. Mazdamundi only survives because I generously signed a NA & Trade pact with him after burning most of his cities to the ground.
HE Armies & Fleets rule the World. My two HE allies are taking the fight to the Vampires in the South- Trade from them gets me 3K per turn from each. No one can conduct a ritual unless I willed it. If I'd kept 2-3 armies at home, swatting Chaos & Intervention armies all the time, none of this would've happened. And even if by some miracle, the 4th ritual is performed- my Level 40 Tyrion & his Full stack of Phoenix Guard, Lothern Sea Guard, Dragon Princes, & Dragons would be enough to handle anything.
TL;DR:- The Rituals are meaningless. Rape, Kill, Pillage are still the perfect MO for any Faction.