Imbued slayer helm would be pointless for you as its for mage and range I'm pretty sure it provides an extra 15% boost to ranged accuracy and damage, and a 15% boost to magic accuracy and Magic damage. (Information from rs wiki Slayer helmet (i) )
As for the imbued berserker ring it provides double the bonuses of a regular berserker ring which would benefit you.
Imbued slayer helm would be pointless for you as its for mage and range I'm pretty sure it provides an extra 15% boost to ranged accuracy and damage, and a 15% boost to magic accuracy and Magic damage. (Information from rs wiki Slayer helmet (i) )
As for the imbued berserker ring it provides double the bonuses of a regular berserker ring which would benefit you.
you should still look to imbue all rings + slayer helm. If I were you I would continue nmz until your 90/90/90 and imbue everything to help with slayer efficiency.