1. Im pretty sure 14 STR is enough, but if its not just TP back to the boat and respec to 18. But I would not leave a character at 18 STR because thats 4 points that could go somewhere more useful.
2. Think of staffs as extra damage, and wands for their status effects. Two lightning wands against an unarmored enemy is an instant stun, or two ice, ect. Staffs have higher DPS so your skills/staff attack will be better. Use both, in whatever amount you want.
5. Yes, again its about 14 wits. I would put that on one of your DPS characters.
Glass cannon works on characters who are not going to be targeted like I said, rogues and such. If you want more AP to do a combo you can always take adrenaline on your mages as well, or skip a turn while invis so you can combo the next turn.
