Starts at 50% at RuneScape gold 1 sophistication all the way to no reduction at 6. Prestige is how many floors you did not repeat. Abandoned is the 4th theme flooring in dung. Begins at Frozen from flooring 1-11, Abandoned 1 in 12-17, Furnished at 18-29, Abandoned 2 at 30-35, Occult at 36-47, also Warped in 48+. Your goal is to attain floor 36 which starts the maximum xp per dungeon (based off my experiences). The 1-29 I said is the flooring you do using sophistication 1, and sophistication 6 with 5 people in a Large Dungeon on 5-man difficulty. Pay no mind to the difficulty once you're doing these floors as it is almost always wisest to select 5.
Melee Void is superior with weapons such as ags, disorderly maul, etc.. With Fury, Bandos, Fighter hat, Berserker ring, Chaotic maul, Barrows gloves, Fire cape: Strike: +195 Power: +193. Conclusion: As your non-void related gear bonuses approach their maximum (by way of example, Onyx or Berserker Rings (I), Completionist Cape, Chaotic Maul, Amulet of Fury), void will become increasingly more worth it. However, if you are using anything weaker than the usual godsword, you're better off with Bandos and barrows gloves.
Void melee w/deflector and barrows gloves is the greatest it is possible to strike with a 1 handed weapon and the most precise
Same equipment but now with Cls and Defender versus void and deflector: Attack: +176 Strength: +163. Conclusion: Basically it's never worth it to melee with deflector if you don't do not have access to Dragon defender, are very low leveled and/or have very weak gear in general.
Range void with any human body and deflector: You forfeit a lot of precision but in this case, it usually pays off. Range is already the most accurate attack style and also the higher damage will do wonders (I'm sure amJordan can testify according to our latest Armadyl experience ).
I can not be 100% on this but I am confident that mage void will give exactly the same result as melee. With void and maximum gear, you are going to get somewhere into the 80s or even 90s with regards to magical attack bonus. If you compare this to Ahrims and the same secondary equips, there will be a whole lot cheap RS gold more than a 30% difference (favoring ahrims). There are still uses for void, they're just few and far between.