Just finished the Atlantean campaign on Titan and boy it was so much easier then EE, so much so that I think they can turn it up a notch especially on the earlier missions
The final mission i have to give credit, you cant cheese it by walling one of the trees with gaia forest anymore, however, you can implosion rush their base and effectively cripple the kronos base, and then by the time kronos comes out and actually threatens you, you can just send the 3 heroes to distract him until gaia comes out. The contarius heroes you get at the start are also fast enough to fetch all the relics on the map immediately.
I have noticed that a lot of the “easy” missions are easy because the enemy tries to start on the lower tech tree and slowly ramps up, arguably to match the player’s progression and not make it overwhelming, but on a lot of these missions you immediately start in heroic or mythic and the campaign heroes or even just convert heroes and a group of myth units can just rush these bases early and completely cripple them or even if you dont cripple them, the AI turns aggressive and I think stops teching up, which means you have a permanent tech advantage.
So what tends to happen is if you are really aggressive early on, you can run away with the game real fast, this is on Titan
So here are a few possible changes to maybe make this for challenging without changing AI behaviour which is harder to implement
Mission 2: the first few greek waves after the scout attacks should be bigger and a bit later, probably trigger after you get to classical, the current ones comes about the time you are aging up, so they are “hard” in the sense that you only have your starting army, the problem is if you clear this with little losses using castor and the 2 behemoths, then you will immediately clear the forward base and then be able to mass Cheiroballista and make the following attacks irrelavent
Mission 3: For some reason the army mass that patrols the plenty vaults are stuck in age 1, their mass is terrifying dont get me wrong but I think as you claim more vaults they should get more techs, and say by the time you claim them all and are about to attack the main base, they should be champion. Also maybe instead of Hyperion as the Heroic god make it Theia cause mass satyrs just shreds everything.
Mission 4: The starting norse base should probably be heavy units, or atleast their infantry should be heavy units, cause mass Cheiroballista + counter cav just murders the base and gives you enough eco for the rest of the game, either that or some way to prevent you from just rushing deconstruction on their starting fortifications and immediately push all the way to the main base.
Mission 5: Either the Egyptian bases need better starting defense that doesnt turn offensive, or they need to either start or age to classical very early cause again a single behemoth and turning your army to heroes loaded into the transport ship is enough to cripple the orange base and get earthquake, which is then enough to cripple red and the dominos will keep on falling.
Mission 7: Fix titan AI lol, and also give him whatever stats he had in the later mission cause this one was too easy.
Mission 9: the starting army of the titan should be heavy, make it their elite guard and a separate faction to prevent the whole base that spawns being overwhelming, a separate group of builders can then come in and setup their base at a slower pace. This increases the difficulty but you can still arguably do the cheese which I think should be kept.
Mission 10: the atlantean base to the north should be better at defending, you can again use a single behemoth + heroes + a few murmillos to rush the base without triggering the massive force that is to the right.
Mission 12: They removed the trees in the Kronos base that prevents god powers from being activated which allowed the implosion cheese, add those back.