As Mick mentions in his remark, "to deem suit" is slightly previous-fashioned although not, I think, more than enough that you should not find out how to use the idiom. I would not get in touch with it "Victorian" English, as it's a phrase that sees regular use even currently. https://juliusaikgb.tinyblogging.com/everything-about-corporate-lawyer-karachi-80344016