New warrior gear question

[Vorkon]

FBSS would be the most beneficial item you could get him as he'll likely be using that for a while. 6.5kish

Crafted BP, legs, arms, hand and bracers. 1.6-2k

Cobalt boots 500p

After that maybe a staff of battle for 800ish.

You've already gotten him some things. As he starts leveling he could fill in the blanks fairly quickly.

Grotesque mask - 90
Sarnak mask - 150
Etc...