can any high lvls give me advice on which skills to lvl up...both my merc and blade skills

Well, for starters, the buffs that don't need a shield are definitely useful. Since you'll probably be using swords (don't remember whether Blades have axe skills), this owuld be Blazing Sword and Sword Mastery. Impower Weapon works with both weapon types. If you plan on having an alternate setup (dual wielding swords AND single sword/shield combo), Protection and Pan Barrier also remain useful. AFAICS (my merc doesn't have it yet...), Sneaker is cast on monsters, so again... can still be used.

Other than that, don't forget that Flyff doesn't have skillpoints, and that skills do not affect each other (on an assist, for example, raising Tamping Hole will not improve your Power Fist, even though both are basically the same). As such, you can continue using the combat mskills that you like; levelling them doesn't waste anything even if you don't use them endgame. Along the same lines, you ignore them and level them later if you find them "suddenly" turning useful ("hey, bloody strike just rocks on a lvl 500 blade, I never use food again").

*Do* make sure to level up to the minimum requirements to unluck the Blade skills, though --- it would be stupid to reach lvl 60 and not getting new skills because you don't meet the requirements...

u said allt he buffs that dont need shields
ok
did u say its not a waste if u lvl up combat skills and end up not using them such as splmash or gullotine
will i need those or will my stats take care of that
if i do need attacking moves which ones r best for blade not my merc skills my blade skills??
i know my stat build btw
40 STA
80 DEX
rest into STR
ty for any info

You'll want Sneaker, Impower Weapon, Blaziing Sword/Smite Axe, and Sword/Axe Mastery (depends if you want to go sword or axe). And I believe the rest you dont need whatsoever.