He's fairly simple, if you can learn his attack and stun him you can take a huge amount of health from him. The only move you need to be wary of is his wind swipe move where he goes up in the air and swipes his scythe. Don't dodge as soon as he does it, it's hard to spot at first and it's pretty fast but you'll spot the moving wind coming at you slightly delayed about a second after he does his scythe swipe, it's dodgeable if timed properly. The real final bosses lie in the later dungeons, the dungeon where you have half health and have to defeat the fire dog boss, amygdala and the other one were frustrating as hell.
Batman is a great game but it's rather short and a lot easier compared to previous versions. main story is decent, if a little predictable and that's from somebody with virtually no knowledge of the batman universe. Side stories are great, the batmobile was a well done feature, although they did go a bit overkill with it early on, however, i was disappointed with the removal of the challenge rooms.
I beat the fire dog first time. I like how you can do things in a different order. I'll try that tho, ta.
Had the first Batman on xbox but couldn't get into it, was going to get The Witcher first but that'll take weeks and the reviews for Batman are good.