you can make 2 different builds!
1.
Full STR! Fire/Paechon/Force
here you have lot of HP and make much phy atk because of the fire buffs (and get some mag deff from buffs too)
so wear garment if you have eneought money xD
but protector is athought a good thing (garment prefered at full STR)
2.
70:70! Ice/Paechon/Force
here you make much more dmg than a full str!
BUT!!!! your crits aren t so high because crits cot callculated with phy atk!
(a spaer nuker make lower crits too with heusk skills then a glavier

)
so you need to skill ice because 70:70 is a bit more int based!
and ice give extra phy def for you and with snow shield you can tank much too (like a str)
you should wear Protector (at this build is garment not a good idea because you already have mag def from INT base.)