Working with complex animator is tedious. Custom script to the rescue! Shortcuts to add transitions. Compatible with preset system!
Select two states and press Ctrl+T to add a transition between the two states. Select two states and press Alt+T to add two way transitions between the two states. Select transitions and press Ctrl++T to apply preset to all selected transitions.
Tools options are stored in a singleton ScriptableObject. You can reference preset inside, and chose if you want to override conditions or not.
Gif Demosntration: https://video.twimg.com/tweet_video/DnZ2Na-XoAAXyGE.mp4