for 32 place the two big triangles pointed inwards and carefully stack all of the balls in the center. just tweak the distance of the triangles from each other.
aqua fortis:
c,13,9;t,11,11;t,9,13;b,5,9;b,2,5;c,1,9;m,1,11,90,1,crrollwwwwwwwwww;m,11,9,0,1,wwwcrolwwwwwwwwwww;m,13,11,90,1,cllorrwwwwwwwwwwww;m,11,13,270,1,wwwwwclorwwwwwwwww;m,1,7,90,1,wwwclorwwwwwwwwwww;m,6,7,180,2,wwwwwcuodwwwwwwwww;m,5,13,180,3,wwcrolwwwwwwwwwwww;m,6,13,0,2,wwwwwwwcluodrwwwww;m,5,7,90,1,wwwwwwwwwwc22llorr;m,7,5,180,1,wcuuoddwww;m,2,3,90,3,wwwwwwwcddouuwwwww;m,3,2,90,2,wwwwcl1orw;
Finally beat middle level: 59 waves, 845 creeps, 23564 gold, score 85740. To pass the last wave, make sure you have all 5 elements and sell all towers except slows. And then max out as many big snipers as you can. You only have to kill one boss to win.