Well, it always depends upon drilling, coverstock prep, and the conditions on which you plan to use them, but, just off the cuff, I think you can get away with fitting both a TNV and Toxic in there.
From what I see, your arsenal should set up like this:
Heavy: Action
Med-Heavy: TNV
Med: Widow
Med: Toxic
Med-light: Doom
Light: Black Hammer
Again, that is just a general assessment. The true viability of such a lineup will depend upon how you drill them and prep their covers. If you do it correctly, though, you should be able to fit all of those into the same arsenal with little to no overlap.
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I've only bowled 300, but I've benched 345
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