You're doing the standard rotation which is good so it's more of an item lvl problem. With your DL gear and Ifrit's blade you should be able to hold hate relatively well again, that is until you come across people running with their relic and relic+1. If you're still having issues with holding hate I would suggest throwing in another Flash for good measure. Something like Shield Lob > Flash > CoS > Flash > RoH combo then cycle as needed. Sometimes that extra flash is all the difference you need to stay ahead... I would also suggest that you take the time to level your MRD as you can pull skills from them that help with mitigation which can also help with hate control.