Kingdom Rush ReVengeance - Pond of the Sage Campaign (Impossible)

This was incredibly hard and scarily close. I let one amphiptere and one chaser past, one Demolisher almost leaked through and I almost failed at the boss battle, but somehow I survived everything. My strategy wasn't the best, but it did the job. I went with Bone Flingers, since they are better at dealing with leaking flying enemies than Shadow Archers and they have better blocking capabilities. I also chose Volcanic Altar to provide as much blocking potential as possible, since chasers demolished all kinds of barracks. Lastly the Swamp Thing was more of an afterthought and it was there, to take advantage of its range, hopefully hit some leaking enemies and create makeshift barracks. To my surprise they kind of worked and saved me a few times. Doom Tank SG11 is self-explanatory, it's just the goat of heroes.