Stuck on the last part of The Sacrifice [Spoilers]

[Cec1l]

So I've merged with Umbra, and its at the part with killing all the sentinels but.. They two-three shot me. My sword does jack all and when I run out of energy I die. I cant restore energy, I get stuck when they all swarm me, and Ive used all my revives and im so friggin sick of doing this over and over and over again. Is there a trick to it? 

[(PSN)DBB-289]

Have to ask: How is your Operator looking? 

What Focus Tree do they have active? What's their Amp looking like? Do they have any arcanes?

[Agentarizoa339]

i'd suggest using your operator. and equiping your umbra with an energy siphon aura mod to rebuild his energy back. mainly use umbra to blind the sentient enemies and use operator and several specters to further keep the sentients off your operator  

[(NSW)AWTxuderfairy]

All I did was mod the frame and the weapons to maximize the damage and energy 

[Lutesque]

If its at the last encounter.... I did it using Radial How, Exhalted Blade Umbra and my Operator's Amp....

Blind the mimics.... stab them with the blade until they resist.... zap them with the Amp then repeat until they all die....

[(NSW)Kyroto]

This might take awhile, but how I did Mimics when I didn't have all too good gear was just spamming OP. Once you die, quickly go back to OP and laser them. I did it with basically a bare operator, though it took quite some time in order to do it. Remember that the Radial Howl removes all resistance stats from the Mimics as well.

[(XBOX)Snyx inytsu]

basically, i would blind the sentients then use the exalted umbra blade at close range