I didn't spend much time with just two sources of APoC, but I don't remember much of a difference. It should work just fine, but against single targets, it might be a little harder to maintain meteor spam. The CC value may also work lower, but that's just what I had with my gear + scoundrel + paragon system @ P198. I'll try uploading videos tomorrow. There's also a Wizardspike glitch that causes it to proc much more than it should.
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My SNS at it's best: Silmeria