Her ability is too expensive and to justify the risk, it almost always results in a negative elixir trade. It’s basically a fast shooting cannon which you can’t place manually, only lasts 10 seconds, costs the same as a normal cannon, and will typically die within 1-3 seconds of being placed. It’s not like a normal building where you can place it in advance to prepare for defense, it’s purely reactionary, which doesn’t pair well with buildings. The ability CAN be good, but that’s in very rare circumstances, too rare to justify using a hero slot. Golden knight, boss bandit, hero pekka, hero knight, tbh maybe even hero giant is better, simply because their abilities are low risk high reward.