Laputa H-19. Advice?

Any pointers on this one. Kinda weird to get past. Im a lvl 38 crystal. Have lvl 5 stones in attack and defence. Any pointers to get past this one? Any help would be great, thanks.

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http://www.haypi.com/forum/viewtopic.php?f=504&t=15744

Here's the guide. Hope it helps.

That there is a very nice guide but turn 4 is very difficult