You can skip some fights by running past enemies, but if you're struggling with combat the best solution is to take some time to optimize your builds. The game incentivizes glass cannon builds where you generally kill mobs before they can even attack. If they can't attack you don't have to worry about dodging/partying. I won't give any actual builds, those take too much effort and IMO it's more fun to figure them out yourself. But I will give some tips to make combat easier.

If you have defensive pictos/lumina equipped swap them for damage or AP.

Don't be scared to use color of lumina (for more lumina points) as you can get hundreds of them throughout the game. Trust me, having more lumina equipped will absolutely make the game easier

Also don't be scared to use recoats to respec your characters, you can get plenty of recoats. Try out different skills as some of them are more useful than others.

If you're struggling to strike first in combat equip first strike lumina on all characters. That lumina pretty much becomes mandatory in late game as even with all the speed modifiers stacked you still might not start first.

Also invest points into agility. Agility is the main stat for speed and speed dictates how often you can attack.

It took me a while to figure out how important higher level pictos are for their stat boost. Your base stats become basically irrelevant at one point when you can give a character 500 defense with one picto.