Depends on how you want to use him/her. Since I pick my MU as a magic asset and strength flaw, going full mage (sage, sorcerer) grants me with higher damage output from tomes/dark tomes and as a Sage I can also support/heal. Also, you can use Rally Spectrum as any class once you learn the skill.

If you're looking for a much more all-around character, then Grandmaster is definitely the way to goo. It's got good stat spreads (everything at or above 40 for Morgan) and being able to use both a Sword and a Tome is a plus, thanks to Ignis.

Yes, Rally Spectrum is the one I meant. But yeah, I like the Grandmaster class, I think my Owain can also be a Grandmaster? But I saw no real benefit to it. Perhaps after finishing the Swordmaster class I'll change him to it.

Oh, and Griffon Knight or Wyvern Lord?

Owain is a good Dread Fighter.

Depends on how you want to use him/her. Since I pick my MU as a magic asset and strength flaw, going full mage (sage, sorcerer) grants me with higher damage output from tomes/dark tomes and as a Sage I can also support/heal. Also, you can use Rally Spectrum as any class once you learn the skill.

If you're looking for a much more all-around character, then Grandmaster is definitely the way to goo. It's got good stat spreads (everything at or above 40 for Morgan) and being able to use both a Sword and a Tome is a plus, thanks to Ignis.

Winning with ease isn't that difficult, even without any amount of grinding, at least on Hard. I'm running two files, one for maxing out everything and another as barebones as possible, and on that one, i'm already at chapter 11 too and I haven't promoted a single unit. 

It'll probably be a different beast for Lunatic, but as difficulty goes, this FE isn't as hard as Fire Emblem GBA and Sacred Stones (haven't played the DS one, sadly).

Yes, Rally Spectrum is the one I meant. But yeah, I like the Grandmaster class, I think my Owain can also be a Grandmaster? But I saw no real benefit to it. Perhaps after finishing the Swordmaster class I'll change him to it.

Oh, and Griffon Knight or Wyvern Lord?

Don't be fooled by the difficulty settings, what's labeled as "normal" is actually "easy", "hard" is "normal" etc. The GBA games weren't any harder on their respective normal difficulty settings.

The problem with this game (and to a lesser extent The Sacred Stones) is the option to grind which throws everything off. The only way for the developers to make it a challenging game is by implementing such strong enemies that grinding is required. And that's just cheap and forces the player to invest time into something that shouldn't be necessary in a properly designed strategy game.

Personally, I prefer Wyvern Lord to Griffon Knight, since it hits harder, has access to Quick Burn and Sword Breaker and has higher defenses. The downsides of both classes are the low speed caps they both have, and you'll find a lot of promoted enemies on later maps that will actually get x2 attacks against both classes (wyvern lord mostly).

Yeah, I know that the difficulties work like that, but overall it feels like the game is relatively easier than it's older counterparts. Even if you disregard grinding, there are a lot of mechanics that makes your work easier, like pairing up, skills, etc. 

As for grinding being necessary to overcome strong enemies, i'd rather have that option than having a ridiculous strong enemy coming out of nowhere and creating a wall that you can't overcome no matter the strategy you put into it. I play a lot of Shining Force and all the games in that series love to do that, which becomes heavily frustrating because it basically forces you to start the entire game all over. Not saying it's a good game design, but at least it's an option.