Level 10 is like the ultimate level of pals. Level 10 itself consumes more pal treats than level 1-9. It should have some special effect to justify its cost. Think about it, it costs 7500 gem for 20 pal chests, which gives about 35k food.
That means you need about 50k gem to get that level instantly if you want a level 10 pal. The additional stats just don’t justify the cost.
Many people are even sad now when they get pal treats from pro chests.
All these will change if level 10 pals are given some special secondary effect or buffs. People would treasure pal treats more and actually appreciate it when they get them from pro chests. Here are some ideas:-
Tammy - Apart from its healing, it constantly gives an equivalent of 20% healing aura effect like the heal aura ring.
Howl - The Howl guarantees fear like the frightening wolf effect
Bucky - The shield returns 20% damage to melee attackers
Phoebe - Opens a portal for 3 seconds where Blessing is cast
Aska - Summons ghost versions of the units which are immune to lightning
Eris - Increase its attack speed to 1.7 from 1.2
Kaiser - Additional 15% luck
Nidhogg - Ghost units that are “summoned” from its Black Magic are at full health
Eldrak - Firestorm range increased to 7 from 5.5
Archimedes - Has a 4.0 radius permanent “freeze aura” effect around the pal
Aki - Confused units cannot recover from confusion until they are attacked by the player raiding (Not counted if they are attacked by own defensive ally units)
Growl - Intimidated Units lose their boosts when they are in their frightened state (Is this hard to code?)
Irmgard - Knockback spell goes in all direction instead of just where the pal is facing
Bela - Has a separate ability range of 2.5 that also drains from buildings (The ability range against units remain separate and intact)
The suggested values for abilities are arbitrary to what I think is appropriate, and can easily be adjusted for balance purposes of course.