In reply to FreshSlate:
Alpha Lights aren't available yet. If you're after a comparison of the Helium and Alpha Trad I'd say the Helium is the clear winner, being stronger and lighter whilst still having great handling and clipping action.
For a lightweight trad/multipitch sling 'draw have you considered a Phantom at the gear end and a Helium at the rope end? I've had some set up like that for a few years now and they work a treat (the Helium's clean nose and full size help with handling when extending the 'draw). You can do this relatively cheaply by getting cosmetic second Phantoms from V12 along with a Helium red 5 pack, unless you can get cosmetic second heliums as well (V12 sometimes have those as well as they're made by DMM).
For the gear end of your trad 'draws I would avoid Heliums and Alpha wiregates because that bulky clean nose does get in the way when you're trying to clip awkward gear such as wires in tight spaces, wierd pegs and tat. The Phantom's narrower nose is much better for this and with a 3-sigma rating of 9 kN gate open you don't need to worry about the lack of a shrouded nose.
When Alpha Lights become available they might be worth considering for a better clipping action at the rope end of a standard 'draw, but for the rope end of a sling 'draw the weight saving over a Helium might well be offset by the fiddlier handling due to its smaller size and more steeply hooked basket.