get strong enough shield and learn first to block all his moves so that your endurance doesn't run out. You might have to do a roll with his uber combo if you're not backpedalling away fast enough. Only counter-attack when you're sure he's not gonna be punishing you afterwards. Have patience really.
repel his dark magic with silver pendant. Some of it might be a little difficult to time correctly, but use estus if necessary.
it's a tricky fight for sure, but this is the strategy i came up with after dozens of defeats. Once you learn the right pattern, it's gonna be just a matter of slight luck. Sometimes it's really hard yo avoid his dark magic and you might get killed every now and then, but such is life ..and dark souls. --- Devil May Cry: The Order --Devil May Cry reboot prequel choose your own adventure with RPG elements. Or something-- Join the resistance on a DmC-board near you!
I recommend watching http://www.youtube.com/watch?v=KfA-aMquCXY to anyone who struggles with Manus. It's a SL1 NG+7 melee only, no pendant Manus fight. The person doing this is very skilled and explains/shows a few things. I watched the whole series before I began my own SL1 run. Very informative and entertaining. There is no obnoxious voice, but a lot of annotations.
If you're not right in his face trying to circle behind him like he's a titanite demon, you're f***ed.
He might be a psycho, but I joined that club too. I used the same tactics and wrecked him.
That said, Artorius showed me 'the art of ruin' many many times. I got torn many a new ******* by that guy. Beat Manus first go though. --- Peasant: What line of business might you be in? Hopkins: God's Business: witch-finding!-Do you confess?