The MP consumption of rune skills at high levels is very high and the MP literally drains out in less than 10 seconds and the MP regeneration is very slow and the MP potions have minor regeneration effect. Therefore, I suggest the implementation of one of the following:

1- Decrease the MP consumption of the skills
2- Increase the recovery effect of MP potions
3- Increase the base MP of characters
4- Add more potions to the shop (lesser, minor and major)

I hope you take my suggestion into consideration because I feel its unfair that after investing huge amount of resources into your skills, the AFK runs on normal attacks 95% of the time.