Please edit and add your own methods!
My methods aren't very exiting, but I will give you what i can.
Set a rank 1 turrent on a high position, and it will shoot farther t should come running. Hide by drilling in a hill, and putting a block infront of your foot.you will have a 'window' to shoot out of while the astros try to take out your [turrent], you can shoot at them. for any astro higher than white, rank 2/3 turrents are reccomended.
My method is find a unabandoned astro lair toss around 4 gold bars down wait until you hear 2 Astros fighting then jump down...and join the fun!