Tree

1. Gotta practice aim points.
2. Need a strategy for all levels. Strategy may change based on branch level. Same map may have different strategy at b30 vs b38
3. Some maps, use curse on one drag and hide to cause them to hit each other.
4. Really gotta get good at bat. Ur main weapon.
5. OJ health or attack first. Then the other. OJ mana very helpful.

Why OJ mana? Is it just for the double power volley?

OJ mana helps with vpp and also allows ppp with more motion after for positioning.

I played the tree using my level 40 devil with all purples, and I can still never beat it. I usually die by level 36-38, and I've beaten 39 only once. Any more tips?

I had no problems passing tree with an all purp lvl 40 devil, did it daily. You just need to learn how to play the maps! No ones gonna give you a play by play for every map, just practice the ones you usually die on

Your dragon's safety is priority, try to find a good hiding spot for every map. Another thing that you need to do is to wait for a good map to appear. Good luck!