[Snake]

This costs 5 SP, and spending SP on it only makes the skill use less FP, which means for a SP starved class like Engineer, no one will want to use it.

While lowering this to 1 SP cost and calling it a day would be more than fair and enough, the fact the heal is tiny also does not help. So I'd like to propose the following for this, making it similar to Meditate, but scaling from Guile instead of Skill, not extending positive effects, having the possibility of happening immediately if you move, yadda yadda:

Repair
6+M.

Take your time and fix up broken machinery. Target an Engineer device or Mechanation, and at the start of the next round, you will heal your target equal to 200% of your Scaled GUI, plus a bonus based on Rank. If either you or your target are moved away from each other, or you are inflicted with Clumsy, the heal happens immediately, but is reduced by half. (Only one effect may apply at a time, multiple Repairs cannot stack.)

While you are repairing your target, both gain 5% Damage Reduction (per Skill Rank) for the duration. If you are defeated, the skill ends and will not heal.

At Rank 5+, if you have at least 20 Any Ingots, you'll be prompted to enter a series of directions. If you enter them successfully, you will use the resources on your target to lower the duration of all negative status effects by 3 rounds, and revive ally Mechanations. (Failure has no penalty.)

Rank 1: 14 FP,   2% Max HP.
Rank 2: 12 FP,   4% Max HP.
Rank 3: 10 FP,   6% Max HP.
Rank 4:   8 FP,   8% Max HP.
Rank 5:   6 FP, 10% Max HP. Can revive defeated Mechanation allies and shorten debuffs.

[Poruku]

Yeah sure that sounds cool, even the weird part about using ingots

[Snake]

This was subtracted from my idea of Crafter base class, which uses items from your inventory to empower/enable its skills, rather than Focus.