EMG actives are a big part of his sound, though I'd guess blackouts would be pretty close in that regard, never played them though. I had a few guitars in the 90's with EMG's and they are good pups, just a pain to install.
That said, a 7 string Ibanez with what, a basswood body ?, is not going to give you Zakk's traditional tone which isn't just about the pups but about the guitar.
Its just like you could how you couldn't put some vintage slightly overwound singles into a LP and expect to sound like SRV.
Pickups don't produce tone on their own, they are part of an overall system thats made up of the neck construction, wood type, scale, type of strings, how you play, your amp, etc etc
You could however try painting a bullseye on your 7 string which no doubt helps with the Zakk tone (or so says the marketing dept!) LOL