I think you definitely need them. That RR is too good to pass by.
Regarding items, if you have one, you could also try Murmur’s Kiss.
IMHO, you should also focus more on acid damage / acid retal with your devotions. Here is an example: https://www.grimtools.com/calc/m233DaY2
Disclaimer: This is NOT my build. It comes from the collection of Chinese builds posted here recently. It’s also not an Aegis build - but the devotion setup should give you an idea what you can try.
EDIT: To free points for guardians, you could for example take them from Decorated Soldier (IMHO not that great for retal builds) and Vire’s might. If you don’t invest heavily into it, you can also make it a onepointer simply to get a free movement skill…