There are a few reasons to skip misc and heals. :x
Magic Upgrade: Increases Magic by 3% per level (30% total).
› Not much help at low levels nor is Magic a helpful stat. It takes way too much Magic to make a noticeable difference in your damage. It's always been about a weapon's Magic Min/Max Damage and a stone's Min/Max [Element] Damage/Intensity.
Elemental Harmony: Raises Physical Evasion by 1% per level (10% total).
› Low levels have no purpose dodging. They just don't have enough evasion to make that difference.
Magic Detection: Raises Magical Evasion by 1% per level (10% total)
› Do low level monsters even cast magic? .__.
Mind Square: Raises HP/SP recovery rate
› An okay skill to get. Not that much help at low levels since you have low HP/SP, which a pot can easily remedy.
The rest of the skills under those state above don't serve much purpose either. They also take too many points for someone who's just still leveling to level 80.
In the beginning, it's a good skill to have. Saves you HP pots so you can spend more on SP pots/equipment.
Once you get to level 60+, you begin training on mobbier places. Being hit every time, I don't see why you would stand there healing yourself (draining SP) while the monsters keep barraging you with lots of attacks.
It's better to just use both HP/SP pots while killing them as fast as possible.
I've tried the heal skill and found it pathetic in terms of how well it works in a solo situation.
It healed me around 35x (?) HP and before I know it, the monster already knocked it back down.
There is one thing that I did enjoy about the heal though. If you have a grinding partner who does most of the damage, you can get it. I had it from 70-80 and I mixed it in combination with wind skills. Between those levels, the grinding location can become mobby and a HP pot + heal is more than enough to raise the HP back to 90%.