This game actually made me break my streak of not summoning anyone else for help with a boss.
FUCKING.PONTIFF SULYVAHN
Last time I summoned someone for help in a From game was like 4 years ago when I was playing through Dark souls for the second or third time and needed help with O&S.
EDIT: Even managed to beat the goddamnon my own but not the stupiddancer of the boreal valley.Pontiff
What I did on try 2, and found to work really well:
Wear your heaviest, best, thickest armor. If you have it; use iron skin (i used it once, only lasts for a bunch of seconds). I wore winged knight set and was 98% weight.
You cannot roll and actually, you don't need to. A lot of his attacks have a hitbox of a shrimp. Simply strafing and hugging his sides will do. Don't be afraid to hit him a lot, but remind yourself to stop hitting and refill your stamina (stamina ring will help) to block more upcoming attacks. I expect great shield will help greatly, too.
You cannot roll and actually, you don't need to. A lot of his attacks have a hitbox of a shrimp. Simply strafing and hugging his sides will do. Don't be afraid to hit him a lot, but remind yourself to stop hitting and refill your stamina (stamina ring will help) to block more upcoming attacks. I expect great shield will help greatly, too.