Between my main titan and several scraped and remade alt titans, it took me about 32 something raids before I got everything I needed. While my buddy did it half as many times as I did and got 3 different classes of characters to 30 and has four mythoclasts and every raid weapon you can get. and I still have yet to get one damn heavy weapon. this game is an ass, just keep trying dude, you'll get it at somepoint or something.