How does that have anything to do with the fact that the 5 forma sink is artificially invented without a single value for the investment? Are you happy cramming nearly 75 forma into 15 random weapons? Yes? Go nuts! Forma each one of them by 5 additional ones.
What is justifying the forma requirement and the time invested into maxing these weapons? 1000 exp per weapon? I respect DE and their work too much to continue elaborating on this point. I simply cannot find anything to counteract the negative impact this approach/system brought on the balance of investment (time, resources, money) and the reward, as compared to any other WF weapon.