If the signs are this obvious then the valuation would already be high enough to be unattractive to an angel.
I've done some (roughly 8 deals) angel investing myself, and prefer to look for something market-shaped; matching buyers to sellers, or similar; a team I would seriously consider working for; and a working prototype for me to look at.
The first is because that's the kind of thing I like to think about and because I think those tend to be scaleable businesses, the second is because as an angel I want to actually spend time for them, and the third because I think most powerpoint presentations are crap.
There are some additional parameters around investing (like how much the valuation is) but I'd much rather help an entrepreneur who is going to shoot for the moon.