So, I have been testing Adventurer Abilities, and it seems like maxing out Regeneration is a complete waste because it STILL heals up to 50 HP no matter WHAT it is upgraded to. If there is nothing scripted in to what percentage of HP it regenerates when used, I suggest:
1/5 - 15%
2/5 - 20%
3/5 - 30%
4/5 - 40%
5/5 - 50%
Though to keep it balanced, the skill will only last longer, but not regenerate faster. It will regenerate more HP based on your max HP.
Rock Throw seems pretty good, but it just seems useless if it is not upgraded to 3/5. I do about 177 - 202 damage against an Elder Shroom, and a Rock Throw deals around 183 - 204 damage, so it is barely a difference (I’m mostly invested in STR atm). Rock Throw should really be buffed, considering it takes a good chunk of MP for just hitting one mob with the damage of a basic attack.