Thanks. I'm going to tell him to get ant haul. Muleback cords seem like a good investment, I'll ask the GM (my brother) to have us find it. For armor, he has a hamaraki which weighs one pound. He will probably get a dagger which is another 1 pound. The sack is 5 which brings it up to 7 as the rest is in the sack. We don't play with clothing weights.
On another note, how good of an investment do you think slashing grace (dagger) is. It would take up 2 feat slots, but increase his damage by like 8.
Also, have the character carry around antiplague and antitoxin. They will be useful to ward off disease and poison STR loss. They could be a life saver if used judiciously.
Weapon damage is going to be terrible without using DEX for damage instead of STR. If the character ever wants to get into melee weapon damage, then Slashing Grace is very good. That said, it can be avoided if they just use spells and simply ignore STR/DEX to damage.
Chill Touch eliminates the STR/DEX issue. The character could sneak attack for 1d6 Chill Touch + 3d6(?) Sneak Attack at level 5. That's a decent attack at level 5. When more spell slots are available, Shocking Grasp makes for a bigger hit (5d6 + 3d6 Sneak Attack), but you have to cast once per successful hit.
Range Touch Sneak Attacks are ideal though, if a little harder to pull off. There are a lot more options and it keeps the character away from as many grapples.