Well if your timeline were long-term I would say either FIS or DML would be a pretty good call, with FIS potentially having the greater value considering the wildcard that is the PLS property.. Oh and as already stated PLS is being spun out so DML will have none of that.

Now since your timeline is more short-term AMW is the pure, simplest, play as far as PLS  and offers the greatest risk/reward (this is where my moneys at!), DML is probably the safest bet, more tied to  the uranium price I would guess and has that buyout potential wildcard (but unlikely to come until after the FIS deal in finalized)...   As far as FIS for me short term that's the hardest to gauge as I think the stock price is more tied to the buyout then any additional discoverys out of PLS, althought I do think something significant at PLS has the potential to move the price, it's just that I think the market cap might be pinned down to the buyout, the buyout kinda acting like a lodestone I guess... Of course come April and the deal with DML is finaized, the spin-co company should hit far market value (aka.. AMW value) very quickly... However should the deal not be finalized because of delay or competing offer then very quickly we might find ourself in May and apprently that's when you want to go away...  

So short-term FIS holds limited upside and of course downside being tied to the buyout, AMW is free to run  or fall depending on the drill results and DML being a mid-level, almost, producer has safety in that... and is tied to the spot price more then the others...

Just my thoughts, don't know if they helped..