Ugh this battle not any easier than Fake Trio,Dopple-Richter have incredible resists so all whip attacks are useless.Method on video pretty much the only way to defeat him without using sub-weapons or other MP consuming abilities.Well you CAN kill him normally with whip attacks but only if 5HP damage are not problem for you)))
![](https://i.ytimg.com/vi/esyvKwRZhZo/mqdefault.jpg)