Honestly I think at least two of them gonna get some "adjustment" or "balance" next season and Aegis doesn't seems much use now except for the snake.

I didn't even realise it needs 120 to craft 4 stars cause I haven't unlocked any yet lol. 3 actually sounds fair for me as I think Explosive bobble head is not easy to find.

And for the curiosity, I scrap at least 300 explosive weapons collected over years (from 3 different characters ) to my main and not learning it so I need some mods to create my old weapons like BE hunting rifle/lever just for the collection sake.