I agree but...for me I don't care i just make a big room like 200 block tall and 100 block wide. and some healing stuff like heart lantern and some campfire.Usually what I end up doing, is I'll find the largest open area in the Jungle, and study the map a bit and then go find a bulb and drag her to that area. You just need enough room that you can keep running away from her while plugging her with the weapon of your choice, turn around and go back the way you came when you run out of room. As long as you got, I don't know, 2-3 full screen lengths of space that you can travel and keep her in line of sight the whole time and preferably have room for her bouncy balls to fall out of harm's way, you should be good. A few wooden platforms to refresh flight time are also helpful, but you don't need to make a full arena.
Also, setting down a temporary campfire or two and/or heart lanterns or two can help loads too. Most people scoff at passive regen (at least from what I've seen on forums), but they don't realize that over the course of 2-3 minutes they get a free potion worth of regen.