Would only add to GAC's commentary that the RVX.W's have the highest risk as well. If another P3 is necessary to the tune of 3 to 5 thousand patients even if everything goes exceptionally smoothly and a FA is done after 1 year after the last patient is recruited that would still put you at a minimum 18 to 20 months down the road. With just 16 months of life left in these warrants my preference is to hold less shares in favor of more time. 

In order to do another P3 there would likely be some kind of a partnership announced prior to the start of that and should have a positive effect on the share price. 

It all comes down to your personal risk profile.

tada