Meanwhile, Uriel went back inside the Ninth World. Although the original weakness that Uriel saw before the fight was to fight Eins outside of the Ninth World for a maximum guaranteed win, the strategy that includes the Sage Monarch might be their best bet.
Uriel created multiple clones of herself. She used Shadow Shapeshift on all of the Dark Shadow Summons and her clones to give them properties of Shadow Hardening and adaptability.
Since Uriel has all of the skills of Seth and all of his companions, she is actually using Rim's Adaptability Skill to the maximum.
That is also the reason why she is so resistant and can easily adapt, analyze, and overcome almost all situations.
Especially when she is pairing it with Complete Analysis.