The problem is that you want to open with your Hurracan half, and close with your other half, not the other way around. Hurracan themselves have their own life gainers like El Matador, you don't need to go out of clan for it.
That said, Sakrohm definitely fits much better than Nightmare. Murray is better for your idea than anything Nightmare can offer, and you have Petra if you need the SOB.
I disagree that you have to open with Huracan.
With a Life Gain + Huracan deck, is the other way actually. Gaining a first round with Pan, Diana, etc.. makes your bonus for Huracan cards stronger, and so profitable in the later rounds when pillz are less. Look at it this way; against a Junkz/Sentinel, at the begginin' the difference in attack manipulation is +6 for Huracan (in ELO), which is normally one more pillz the opponent has to play in order to win the round. If u sneak a +3 life gain card without overpilling to much, now the difference is +9, which is +2 pillz difference most of times.
That, ofc if u actually manage to pass with the first card...