Sacrificing for fun and profit isn't either
However, if you do want to use it, at least use Imp Masters, a 3-cost 1/5 Neutral that summons a 1/1 Demon Imp at the end of each of your turns at the cost of 1 of it's HP. I would also recommend Power Overwhelming. Not only is it a good card in it's own right, but you can buff those 1/1 imps to 5/5 imps, then run them into something, then sacrifice them for 5 health, etc. Or otherwise make use of it with your other Demons in like fashion.
For more Sacrificial Enjoyment, you may also consider Shadowflame or Void Terror. They are both Rares, so you might not have access to them immediately, but it's an option if you particularly enjoy killing your own stuff.
I'm not sure what Demolisher is doing for you, it can be decent in control, I've tried it a few times, but I feel like there might be better options. YMMV
Since you have Drain Life and Sac. Pact, you might consider Pit Lords. They can also be good control pieces, as well as a solid platform to apply pressure to an opponent so they have to use their cards on it, or risk being beaten to a pulp.
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