Board Thread:Game Discussion/@comment-96.231.234.53-20130601032319/@comment-9204520-20130601152830

For short answer

For top 100 yes, you need to spend money, because you need to have X5 card(s) to kill big bosses by YOURSELF because 90%people only deal less than 10m damage for level 6 bosses

For top 1000 may or may not, although the least amount I spent was $5 for top1000 but there are guys spent zero and got top 1000.

Simple tips to be the best? Blue cubes ,high power deck and lots of time to play