Boners

[adeyke]

=102 Skill points used out of 111, so you get 9 points to do whatever you want with(golem, more bone armor, a few curses)

There are only 110 skill points possible. I don't think it's really meaningful to assume your character will be slvl 99 and to consider those remaining skill points "extra." Also, if you did go with a golem or curses, you'd be breaking your self-imposed restriction of only bone skills.

Now if a level 20 Bone spirit does 380-413(taken from the arreat summit) then it would deal(after synergies) 1824-1982.4

The AS already includes 1 point in all pre-req synergies. The actual damage for level 20 bone spirit is 340-369.

Your calculations are also wrong even if the 380-413 was correct. The synergies give +480, so it'd be 5.8 times the base damage, not 4.8 times it.

So if it was 380-413 damage, it'd be 2204-2395 with the synergies. In reality, it's 1972-2140.

While bone spear has lower damage, only dealing 205-218 at level 20, it gets 7% instead of 6% per point, gaining +560% damage with full synergies for a total of 1148-1220.8

Skipping explanations, your bone spear would really do 1267-1346.

Now teeth really shines here, getting a whopping 15% extra damage per point, getting in grand total +1200% damage! Now if they do 23-31 base(boo!) they deal 276-372 per tooth, firing 21 teeth at level 20, it makes a nice tool for crowd control.

299-403 damage per tooth.