I skipped a few messages, so I apologize if someone else already said this;
This looks better, but not as magical as some are viewing this. The graphs are showing potential use of the troops, and since HC are versatile, yes tally two seperate graphs of offense and defense and they look incredibly overpowered on paper. The fact is though you don't take both sides of the battle each time two forces collide, they can only use offense or defense once while in battle, and the cutback is that they do both less efficiently. This has been used well before the appearance of Hippos, and more commonly the all HC and D and O only varying from spears and axes strategy. It's not something I recommend to the less experienced of tw as it is expensive and can slow your growth speed if you don't know the game well enough.
It's not a godly tactic, simply another strategy; the risk of it is you lose too much offense and there goes your defense bonus. Vice versa if you send your Heavy Cavalry to towns that get red defense reports. Where as if you had more efficient offense from pure Light Cavalry you'd farm faster and pack more of a punch on enemies, and when it comes to turtles you need every point you can get your hands on. The only variation graphed that comes close in effiency takes twice as long to build though, another thing new players won't really look into.
I'd recommend new players try having pure standard offense and defnse towns before they try specializing villages or adapting strategies like this. Unless they wind up tutored by an expert player. Find a hippo if you want help.:lol: