Forum:Improving infernity?

This isn't really a request for help with any specific decklist, though I do have a question in that regard, which i'll get out of the way first.

How essential are stygian street patrol and infernity barrier to an infernity deck? Those cards are costly(particularly barrier).

In the main however, I wanted to ask about the viability of the infernity build. Are they really competitive any more? It seems like a pure infernity build is not really a great option at the moment, what with gravekeepers rising, and gladiator beasts not relying as much on the grave which makes it less costly for them to lock it etc.

Infernities, to me, seem lacking on their own, so I'm wondering what cards would be good to add in, and here I've ran into some problems. Other monsters just don't seem to fit in well, mainly because most of them seem liable to cause problems in regards to having no hand.

So, does anyone have any ideas as to what I could add in to infernities. I don't think dark worlds would work(high level ones could get stuck in hand, low level ones aren't worth adding the support for), but hold out more hope for fabled(which would also allow access to chaos, and not be hit so hard by shadow imprisoning mirror).

What do people suggest?