Hard to make any definitive statements as all scenarios are possible... dilution before deals, or deal(s) before dilution.
IMO, a deal with upfront cash for the 1st NEO indication is the most likely scenario, as AMGEN should have high interest, trial is open label, and they should have some prelim data 1st qtr 2019.
IMO, even if a partnership isn't announced before dilution, in worst case they should be able to at least release some new data (AXAL/PSA or initial NEO data) to get the valuation higher, before going to the capital markets.
On potential AMGEN milestone payments, I think you should eliminate it from your thinking, as they're simply unknown and likely highly back-ended. A nice surprise if one hits is how I'd view it.