New Client: Print/Digital Magazine, Scaling Subscriptions, Limited Monthly Budget...Recs???

I'm trying to wrap my head around this client and wanted to throw it out into the sphere.

Print Magazine

Goal: Increase Subscriptions

Budget: $2,500 per magazine brand/mo.

Channel: Google Ads

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I'm trying to avoid search at all cost, with the latest spam leads with Discovery I'm reluctant, Display won't drive the number of leads they want.

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I haven't tried pMax for subscriptions. But any thoughts on campaign types or tactics?