- when to attack
- when to dodge
- when to stun
- when to counter
- when to run the hell away!
Of these, as in the Arkham games, dodging is far and away the most important. A fair amount of the enemies in this game don't let you dodge, but you can control your dodge with the left thumbstick. There's no shame in running to spare your own life, and no further shame in running just far enough to clamber up a spire and begin raining ghost-arrows on the enemies you can weed out.
Get comfortable using your environment. Breaking line of sight is so helpful.
More importantly--this part of the game, where you're tasked with wiping out the first four Warchiefs, is a serious roadblock. It's a substantial step up in difficulty from what you've seen thus far, and, ironically, just past this is the point where you'll receive some powers that make the rest of the game kind of a joke. I wouldn't go after the Warchiefs nearest the southern part of the map until you're good and ready, or at least until you've thinned out their ranks of bodyguards.