Well I've had some good experience with the Jungle Elves, as has my nephew. And the Cloaks didn't have a good first showing vs. the Dwarves, but then they did a number on my Jungle Elves. Those 2 Assassination cards from the Cloaks are brutal against the Jungle Elves' Lioneers.
Jungle Elves are fast and aggressive, the Cloaks take a little more finesse and timing. When the one Cloak can bring another one adjacent to the defending figure if it wasn't killed, that's a brutal thing, especially when the other Cloak is their Summoner borrowing the powers of the one that can bring him adjacent to the defending figure.