I didn't use prayer the whole match, actually I did, but it was just Turmoil. IIRC prayers aren't as useful anymore. Just get a rapier or your best weapon and spam all the abilities, don't run at all. That's what I did, used like 10 sharks, even at your worst you should use about 20. Just bring a War Tortoise full of sharks if you're weary, you shouldn't need more than 30 in any case. Refer to this guide
Resonance doesn't work anymore so just tank it, would take like 2 sharks.