Should I switch it or not?

Okay, I got FG yesterday and now I am taking my Blademaster through Ultimate Act 1 so that after that I can start FG with her. Now I keep having bad luck with finding a better shield. As can be seen on Grimtools …

https://www.grimtools.com/calc/bVAllqw2

The shield is way below my Blademasters level. From the moment I found it up till now it has been a nice shield, but I feel like now that I am on Ultimate with her, I need to replace it. This is one that I found while playing this afternoon …

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Old and new shield comparison. These are my chars resistances with the old shield I currently still use …

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And this would be with the new shield I found this afternoon …

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Now I am not fond of the health loss but I can handle that part, what I am really concerned of at the moment is the huge drop in Chaos resistance? How fast do enemies start using chaos attacks in Ultimate and in Forgotten Gods? Should I switch to the new shield or stick with the old one a bit longer?