The best set combination should be amp in suit, gloves and boots. GS/Daika and helm deathblow. If you can't afford that, go for boots and gloves shineguard of vampire, rest like mentioned above.
The maximum amp in GS/Daika is 14% from slot. Max you can get would be 28% amp mithril GS/Daika (drop only, 14% amp from craft, 14% amp in slot).
Maximum crafts would be 32% dmg crafted or 16% rate crafted. Both can be maximum of 2 slots, so 40% more dmg each.
Best GS would be 32% dmg crafted and 3 extended slots with 14% rate and 24+24% dmg resulting in a total of 14% rate 80% dmg (pretty unlikely you will ever get this).
The most common PVE combo used is:
SeismicWave(18), Whirlwind(9), CascadeBreak(20), RollingCrash(20)
For PVP combos there is no perfect combo and there's some other threads in this forum with some nice working combos mentioned. Skills you might consider for your PVP combo are: ImpactStab20, Charge20, ForceKick20, RisingBlade20, PowerStab20, SeismicWave18 and Whirlwind9 or Terrabreak20 as finisher.
Best is usually AmuletOfPain+4 or better. Vampiric Amulet+3 or better would be good for PVE too. Amulet of Guard sucks.
Your stats are perfectly fine unless you wanna wear mithril body parts or daikatanas. For Osm Daika+7 you would have to raise your dex to 170, for mithril body parts you would have to raise your int a bit.
Well,i think thats all for now,thx for the Answer.
Regards,
Keekina