Returning to Bravely Default. Should I just start over?

So I decided to pick this back up again. I played approximately 10 hours a couple years back but I got to a boss and didn't get passed it. Somehow I ended up putting it down.

Today I started it and it turns out I am in the Temple of Wind and my boss fight is against Orthos. I am still stuck and I looked at a couple of strategies online but my party doesn't last too long. Should I just start over? I would hate to lose ten hours of progress.

@Josh5890: Id start over mate if having that much problems. I have the game, but ive never played it yet so i cant offer too much advice. But if looking at guides didnt work, maybe a fresh start wouldnt be such a bad ideal.

Start over. You've obviously been doing something wrong in the past if you can't get by the boss in any possible way.
Better to just redo it and get into it more.

Don't start over. Go into the field, get your bearings again with a bunch of random battles, and use that as a bit of grinding to get your character and class levels up.

It's a long game.... Starting over would just make it even longer, and I don't know what benefit it would bring except maybe refreshing your memory on the story, but you can get that by reading the first couple sentences of a synopsis.

Just grind your level up.