Difference between fights
So I started playing this game yesterday and while I'm loving it, I'm having so many doubts at the moment, the main one is the difficulty changes.
I finished chapter 1 yesterday and while in random encounters that I trigger I win with ease, whenever there was a story fight I normally had to try at least twice and couldn't kill all of the enemy team, just had to focus on the objective and that's it. In fact, the final fight of chapter 1 where I fought Argath, it was one of his teammates who killed him with a thundaga while I was next to him with Ramza and it was the third or fourth time I tried the fight.
This is not a complain at all, I just want to know, I love grinding and even more if the game has so many possibilities and I can change so many things between fights. Is the difficulty variation between story fights and random encounters persistent throughout the game?
And a second but less important question because I suppose I'll find out as I'm playing: I had an archer who I evolved into a thief just to learn new job and see more, but I like the archer a lot more. Is it optimal to leave a character in an initial role like archer, or is it better to just go through what you don't like in order to unlock the final jobs?