to get brilliant for 14th level(to kill the 50th wave ninja boss), i used this tactic. For the upper left corner, i built 5 crypts and upgraded them into fearing ones(chilling), and for the lower right entrance, i spammed ballistas. So if ninja comes from upper side, crypts will hit him and then u can kill it with 5 meteors. If it comes from lower side, ballistas will hit it at the same time and at least 2-3 will damage the ninja(it is aoe damage) and it also becomes killable with 5 meteors. Of course you have to buy meteor upgrade from skills and mana upgrade to fire 5 meteors at once=) (total 500 mana). Very nice game. Kepp the comment up pls..=) have fun
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