I'm wondering what I was thinking while I was reaching 200 000 points... For sure, the Scarecrow's gas has some effects : The more rounds you're doing, the harder it gets and more skeletons will emerge. Enemies gain speed while they attack and can reach you easily, especially the swordsmen. And at the 9th round... skeletons will be able to use GUNS!
You take one hit, you die! How many points can you make without taking a single hit? How much time can you stay alive in Scarecrow's world? How much gas do you think you can take? Does it scare to know that you don't stand a chance against him?
Tips : abuse dodging and do combo strikes like Takedown on skeletons armed with daggers so you can't miss any combo. Don't think about combo variations because it'll worth nothing. Just think about surviving. You can amplify your score by doing Ground Pounds if you feel ready or lucky. The best is to Throw skeletons and doing the Ground Pound so you can counter incoming foes. You can also keep on your Power Strike bonus so you can do Takedowns or Throws once you need to do it. The Titan Skeletons can be eliminated with a single Batarang : when they charge you, just throw a Batarang and they'll just crush on the wall. Don't forget dodging them too. Try to end each rounds by using Ground Pounds after using your Super Batclaw so you can get 20x100 points or more for each dizzied skeletons. Don't panic if you lose your combo at the beginning. Just end with a Ground Pound to get more points anytime!
Expert tips : the Batarang will always hit armed skeletons first or dangerous foes (Titan Skeletons as the priority target when they charge). You can use them on armed skeletons combined to a Titan so you'll have less trouble to dodge and attack next. NEVER throw a Batarang after dodging or a previous Batarang use. It'll not only having less effects but it'll be a single Batarang and the combo will end. The best is to use it just after a Takedown and then doing a Power Strike so you can get another use of Takedown next or Batarang and go on with Takedown. Before using your Super Batclaw, make sure you don't grab the ones that got fire sticks : they can hit you once they reach you because they don't drop it straight away. And if you wanna score a lot, just throw a skeleton on a secured place and end it with a Ground Pound. Don't forget to look for incoming skeletons to counter. If they're far, don't hesitate to use your Super Batclaw and hit them with your Cape. Jump over them and use your Claw once more so you can end them and gain many points! If you got a last skeleton alive, just think about using your Super Batclaw and with the Ground Pound.