How to play solo games?

Hi all, I would like to ask this question as an example. I do not have all the expansions, but I do have Core, Hera, Pandora and Titans. So maybe I am missing something vital?

I want to play the Titans alone. In the first game with 1-2 players, being played alone, 2 gods are chosen - Zeus and Athena, add to that the heroes, monsters and troops (Spartans or Centaurs- page 3 says Spartans, page 4 places Centaurs).

So are there two decks as if it were a 2 player game or 1 deck with all activation cards and AoW cards merged, for the single player?
So does the single player now draw 3 cards from each of the two decks and adds 2 x 3 more AoW cards (one set to each hand) and he plays with 2 hands, or he draws 3 cards from the single deck and adds 1 x 3 AoW cards to that single hand?

Please advise, thanks.

Hi.

I've played this campaign in the solo way.

In my case, I just used all the cards in a single deck and played as a unique player (so I've just added only 3 Art of War cards).

Thanks Vlad, I will follow your advise and think it is a good idea:

I have decided to play as follows:
A) 1 merged deck with all activation cards and AoW cards merged.
B) Draw 3 cards from the single deck
C) Add 1 x 3 AoW cards to that single hand