Just beat this with 1671 Idols!!!!!!!! YEAH! I had ~110 chests saved and 2-4 of every buff saved up when I started. I used Queen Siri and the two new champs. All others where core champs. Whenever I beat a boss, I farmed him for about 5 min after to build up and was able to jump to level 40 with ease with that strategy. 40-46 I just opened up a bunch of buffs and SLAMMED though it. Took me about 1hour to get this far. Then 47 hit :(. 47-50 SUCKED. I used every chest and almost every buff. I would tank each level and farm gold with Gold-O-Rama since I could not kill any champs. After doing this 2-3 times I could then tank well enough to kill off everything and jump to the next level. Seriously took me ~2hours for last 4 levels. Firestorm and Savage Strikes is what really saved me in the end. Good luck!
Also I used 0 warps because I dont really like the next champs and want to save those for next event.