Hahahaha lol. Tips? Well what you want to know?
Building tips on skill tree:
Get gears for Double Saber and Twin Daggers to increase dps output, knuckles are optional but they don't do as much damage as DS and TD nor are they good at most bosses or chasing mobs.
Invest into buffing up both wise and brave stance, invest more skill points to improve the stance you would rather prefer.
Stances:
Invest into both Brave and wise stance (bout 5 or 10 points each) because they increase damage based on the position where you hit them.
As for weapons:
Knuckles: Goods: Front-to-Front fighting style, fast attacks once you have gear, good damage. Bads: Very low range.
Note: Primarily use on mobs, very hard to use on most bosses because of the being up close and chasing around.
Double Saber :Goods: Powerful, Close-range, good number of useful PAs, stronger with gears. Bads: Blocking is a counter so must be timed, slowest of the 3 weapon class for fighter.
Notes: Is your standard weapon against ground mobs and bosses or when aiming for lower parts of a boss.
Twin Daggers: Goods: A powerful weapon against nearly all bosses in the game, can go airborne, fast attack rate, increase in damage depending on how high you are once you get gears, good number of useful PAs, can counter a hit to negate damage (spam shift), great chasing ability from air-to-ground.
Bads: attack range is short (can be easily solve with several PAs in the arsenal), not at its full potential when on the ground.
Notes: Full potential is when you are airborne, you are able to reach spots on bosses which all other melee weapons (except for GL) can't, can easily avoid attacks (but you still have to be aware of attacks that can still reach/hit you.)
Think that's about it
@PloCoon
Other Notes: Fighter is great sub class for all of the other classes because of the stances increase damage base on position.