Ok so me and my little bro are enjoying minecraft on the Wii u and we heard about the wither so we decide to make him, only thing is we didn't do our homework on this. We summoned him out in the open not in the nether and we don't have any diamond armor, armor period!! We were able to damage him a bit but he is too high in the air, any tips or ideas? (yes we're kinda stupid I know)

My little brother and I are enjoying Minecraft on the Wii u and we heard about the wither, so we decided to make him. The only thing is we didn't do our homework on this. We summoned him out in the open not in the nether and we don't have any armor! We were able to damage him a bit but he is too high in the air, any tips or ideas?