I wouldn't bother with turmoil, its not special anymore, because everyone has it. Make a zerker with 60 attack, 90+ strength, 45 defence and 52 prayer, you would tear up pures.
The only excuse to not have turmoil is low (60) attack. If you're any higher attack there will be turmoil runepures at your level and you'll just die really hard to them.
Thanks everyone, i've decided fuck turmoil zerkers, too much work. I'll stick with my main which already has turmoil and is kinda a barrows pure. can lock this now thanks