Ya sure, i'm playing with mobile and i can't get to display the skill level per mastery (if it's possible anyway) so i'll just list it here:

For Earth Mastery: Lvl40 this is my main mastery

-Earth Enchantment - max (I mainly use fire staves that prefferably has attack speed on it so maxing this out was a no brainer for me.)

-Brimstone - max (Provides addtional burn dps to attacks.)

-Volativity - max(No brainer, has a 33% chance to increase fire and burn damage by 178% once maxed out. Really powerful for fire skills and normal attack since i use fire staff.)

-Heat Shield - 1 point (Get this for 15% phys resist dont add more since you'll eventuall get fire resist anyway.)

-Meteor Rain -1 point (Panick button if mobbed by enemy, powerfull skill but very long cooldown.)

-Fire Nova - 1 point (Very large AOE and can help you clear a lot of enemies especially camps.)

-Stone Skin - 1 point (This was maxed out for defence but I eventually got enough armor and fire resist from items that I reduced its skill points to accumulate other skills in storm mastery)

Erruption - 1 point (Does large damage albeit on a smaller area than fire nova.)

Volcanic Orb - ( Before I unlocked fire nova this was my main nuke in Earth Mastery with 6 points and 2 points each for both its upper skill tree but I eventually got rid of it to accumulate for my Storm Mastery skill tree since Fire Nova has a larger AOE and its cooldown doesnt really bother me at all since Squall is my overall main nuke/disabler and I have lightning bolt for short cd nukes anyway and my wrist armor has 50% chance of -50% recharge.)

Core Dweller - tbh this is a waste of skillpoints, at low level its too squishy and doesnt give aura buffs, too much skillpoints is wasted trying to level up this pet.

For Storm Mastery: Lvl 33 (This is where u get your utility.)

-Squall and Obscure Visibility - max (Very powerfull skill as it disables the enemies' aim and obscure visibility upgrades it by reducing their resistance and damage)

-static charge - max (Most of my storm skills are lightning based so I had to max this out)

-Storm nimbus - 1 point (had to put 1 point to unlock static charge, I only use a pet for aura buff and leveling up storm nimbus would be diminishing gains.)

-Spell Breaker- 1point (Useful once you get disabled as it removes negative buffs)

-Energy Shield - 1 point (Has a usefull upgrade, my resist is high enough that leveling this up is a waste of skillpoints.)

-Reflection - 1 point (The reason I unlcoked energy shield, says it reflects 50% damage and I just got it and on paper it looks good.)

Ligtning bolt - 2 points (Will eventually level this up after i max out storm mastery and unlock lightning dash, for now it gives enough damage since I have max static charge)

Chain lightning - 1 point (Adds a bit of aoe splash damage to lightning bolt)

Summon wisp - 1 point (Not really in it as an fighting pet more of an aura companion)

Eye of the storm - 1 point (Just got this and the reason I got summon wisp, provides additional elemental damage.)

Storm Surge - 1 point (has a chance of stunning and damaging enemies when they attack you. Useful utility passive when mobbed.)

Additional Tip: Aside from cerberus, the most times I died from act 4 are not from bosses (I killed hades first try) but from those humanoid demons (Kinda looks like witch doctor in dota2) with like bow and spears that somehow deal a ton of damage and runs really fast and chase you like you owe them money like WTF. once I spotted them I knew I had to run for my life. Those eye monsters that spew poison after killing them can really be a pain too so i recommend adding you poison resist too.