Rowan's dimension was half a billion light years wide, you could fit five billion galaxies inside or two hundred billion trillion stars, this detail was significant because to understand the scale of this war, size was an essential component.
At this scale numbers became almost meaningless, what was critical was who held the most power in the battle and the precise control of resources.
Rowan understood that for the issue of resource allocation, Eva was better than him, so he was not leading the war and he was watching the Lady of Shadows, and when she placed Tenma into play, he realized that Eva was still playing to their advantage, as she was hiding Rowan's true capabilities behind the demonic armies of Tenma.
Rowan had speculated that there was a gap in information between all the parties that were attacking him, one side knew an aspect of his powers and the other side knew nothing, but he did not know how long this situation could actually continue.