Since many people are buying Grimoire for the first time today and will be building parties, I'll share some character ideas I had:
Open Hand Expert Assassin (ROW1)
Drake MET-BER-RAN-THI-ASS
Martial Skills: shield, Backstabbing
Physical Skills: Hand to Hand, Lethal Blow, Stealth, Iron Hands, Ninjitsu*
Mental Skills: invocation/incantation
* learned from trainer
Drake for Metalsmith affinity. Open hands for highest damage. He will max lethal blow and shield, then stealth and backstabbing, then iron hands when he becomes an assassin. Ninjitsu can be purchased.
Sword Templar (ROW2)
Wolfin RAN-THI-BAR-CLE-TEM
Martial Skills: Sword, Shield
Physical Skills: Lethal Blow
Mental Skills: Litany, Scribe/arcanum
Ranger start to get lethal blow. Wolfin for Ranger affinity. He will max sword, shield and lethal blow before focusing on litany as he becomes cleric and templar.
Hammer Alchemical Mage (ROW2)
Wolfin RAN-THI-BAR-SAG-THAU
Martial Skills: Hammer, Shield
Physical Skills: Lethal Blow
Mental Skills: Alchemistry, Scribe/Arcanum, nature lore*
* optional, but dovetails with alchemistry
Ranger start to get lethal blow. Wolfin for Ranger affinity. He will max mace, shield and lethal blow, and max Alchemistry before final class change to Thaumaturge.
They can all class change at low levels to rapidly reach their end classes, no grinding required.
You must save attribute gains on levelups and distribute them only when you need to for class change, and then when you reach the final class.