Clothing:

I Prefer Pure Mithril Set!

Mithril Battlesuit +6 or +7 Pure SSA Type.
Mithril Battlehelm +6 or +7 Pure Deathblow. I prefer CDI.
Mithril Battleboots +6 or +7 Pure SSA Type.
Mithril Battlegloves +6 or +7 SSA or Max Crit.

Weapon:

if Your CritRate is 50% Try adding MaxCrit -

Mithril Blade +5 or Higher Pure Deathblow CDI [ if CritRate is max to 50% ]
Mithril Crystal +5 or Higher Pure Deathblow CDI [ if CritRate is max to 50% ]

Cape:

EoF+8 SSA for PvP and Boss-fight
EoG+8 for Dungeon

Jewelry:

Crafted Pain +5 or higher [ Gives Max CritRate ]
Crafted ROL +2 (x2) [PvP] [ Possible for Critrate ]
Crafted Brc Fighter +5 or Higher (x2) [PvE]
Vampiric earring [Pvp] (2x) [ HP and Max HP/MP Steal+xx ammount

now for Stats:

STR only gives a slightly more Attack than DEX, which is not noticeable
STR and DEX both give the same amount of Defense
DEX gives a lot more Hit Rate, Defense Rate and Magic Attack than STR
INT gives the highest Magic Attack but lowest ATT, DEF, and HIT/DEF RATE
We can conclude that:
- DEX gives the most bonus
- INT gives the least bonus
- STR does not give as much bonus as DEX

300 STR
300 INT
all the rest goes to DEX