Masteries

==Recommended Priority Order (Pre-patch 1.2.90)==
 - Max all of your Assist tree (at the possible exception of offline farming speed if you leave the game always online) , this will speed up your progress tremendously.
 - Left and middle of the Talent tree. Left side will allow you to get gems faster due to the gem dungeon cooldown reduction and the middle tree is the highest available boost to your damage.
 - Grab 1 point of HP Absorption (Skill) mastery in the Skill tree, this is all the sustain you'll ever need. Pick this up early if your fox keeps on dying, you may temporarily skip Talent left tree as needed.
After that, fill as you please. You'll find an example of a common mastery build below. You could also take the attack speed talent in battle if you sacrifice the left side of the talent tree, only recommended if you need the offline speed and want to really minmax your damage.
Recommended Masteries
Thanks to Zago.exe for the picture
==Alternative Priority Order - Sustain/Survival for early game (Pre-patch 1.2.90)==
Practically, you should only push up to a certain stage or attempt a certain dungeon level in early-mid game wherein you are confident to survive, and therefore, complete. So as not to waste valuable time or dungeon entries, needlessly.
But it is also in our nature, or rather curiosity, to try challenging our current bests in the game whether be it the best/max stage or best dungeon level.
* I have seen many new members in TDS Discord having the same sentiments, and kept on asking in what game aspect are they lacking for failing on max stage push or high dungeon level attempt by dying.
 The main reason for failure is lack of sustain or survivability -- few costumes, low level gear and/or no spell vamp. 
As previously mentioned from above section, HP Absorption (Skill) mastery in Skill tree is your main sustain. Another thing is increase HP pool and Def to avoid dying from heavy Boss burst damage (but it will not be discussed here).
 My simple recommendation is to prioritize getting HP Absorption (Skill) mastery as soon as possible.
* However, the main consequence of getting the HP Absorption (Skill) early is sacrificing or delaying acquisition of (1) +20% stage gold gain, (2) -20% less gold training fee and (3) -15mins dungeon entry cooldown -- for 1-2 days of game time and/or until you have enough mastery points again. You should be aware of these trade-offs.
::Section by: RyuJin
==Max fox level cap increased up to 149 (Patch 1.2.90)==
Greetings, our adventurers! 
TDS team has heard our plea. With the increase on max level comes increase on mastery points to be invested to mastery skills. 
So, what the new priority masteries you might ask?
# For starters, any of the two recommended priority orders above until you hit Lvl 99
# Then from Lvl 100-149, complete all Assist trees
# Take Battle left tree up to Evasion (Threat Detection)
# Take Skill left tree up to Evasion (Threat Detection)
# Take Battle right tree (1 point) on HP Absorption (normal attack)
# Complete all Talent trees
# Remaining points (maybe around 4-8 points) can be used to any other skill
Posted by: RyuJin