Let's face it, no one uses this weapon other than pressing buttons on quest or just throwing it at a enemy to just bounce off. The best idea is to make this a melee weapon. Melee attack is 75 damage (swing rate is
0.75s), has a multi-hit of 2 enemies, throwing damage is 150 damage, can be thrown but it takes 6 or 9 seconds to come back and it takes gravity as soon it has been thrown (acts like the Rambo from R2D 2015). The costs? It is $45,000 and you have to be ranked 25 to buy it.
Go to here for my new suggestion about the tomahawk.
Yes i think it could be like a rambo that does less melee damage but more throwing damage. 75 melee damage is too much and the amount of cash price you are suggesting is way too high for a weapon you throw wily nily.