I also hope this gets balanced. Another Example. Level 15 Scoundrel vs. Artillery Plant from Level 15 Summoner. When I cast with my quite well equipped scoundrel Mortal Blow with 3 (!!!) SP from Stealth on an Enemy I deal roughly 1000 dmg. The Artillery Plant from my Summoner needs 1 SP, can cast the acid spores twice during its "uptime" and deals (without consideration that the poison might even catch fire and deal extra dmg) roughly 300 dmg per projectile = 5x 300 = 1500 dmg.
If you would now also go as far as to compare "effectiveness" of source points invested then lets have a look:
1500 dmg x 2 (as you can use the acid spores two times durign the uptime of the plant) = 3000 dmg times 3 = 9000 dmg for 3 Scource points invested in a fight
Comparing that now to my scoundrel with the 3 SP ability (Mortal blow):
1000 dmg for 3 source points invested in a fight
This does not even take into account that acid spores can hit multiple targets and that the artillery plant also has normal attack that deals about 300-400 dmg per hit AND has another aoe spell.
Conclusion: serious balance issues!