We gonna compare this two ability since they got the same charge ( hunter 2 charge, warlock 2,5 charge ), the recovery rate is the same ( 12 sec for aim shot and 8 seconds cast time to get back 2 soulshard for a chaos bolt .
so Chaos bolt is 240% of the spell power and it’s magical ( pierce armor) and can get his damage upgraded by 65% in PvP situation. and it always crit so consider it’s 594% of the spell power in PvP. The stats crit increase it’s damage. Got many relation with enhanced spell ( Infernal / Dark souls / trinket etc)
Aimed Shot is 248 % of the attack power in physical damage, that mean it’s reduced by armor and that damage cannot be upgraded . Can be enhanced by 2 enhanced spell ( Double tap ( double your last Aimed shot or Rapid fire) or Trueshot ( reduce the CD of Rapid Fire and Aimed shot and the cast time of your aim shot).
the point is a warlock with full enhancement cast the same number of Chaos Bolt than a Marskmanship hunter freecast (both).
But for 4 cast of Chaos Bolt and 4 cast of Aimed shot ( 8 seconds) :
- Warlock will get (Chaos bolt to 594% x damage azerite trait (i will not count this) + 30% ) x 4 = 3 088,8% spell power in damage pure
- Hunter will get (Aimed Shot 248% - 35 % armor) x 4 = 646,88 % of attack power
So for 4 cast of Chaos Bolt and 4 cast of Aimed Shot , the warlock destruction is stronger by 4,774 time above the Marksmanship.
Considering that warlock is OP in the actual state. it mean that we can reduce the multiplier (4,774) necessary to make Marksmanship viable by rethrieving 1,5 of that multiplier to make MM hunter join the actual Meta.
And since it’s not interrumptable spell we reduce by 1 the multiplier
2,274
This is the multiplier the marksmanship need in PvP to be able to get correct damage on Arena.
Since it’s a channelled ability, you just have to CC Rapid fire in order that all the 225k damage dissapear and the Marksmanship hunter must spam steady shot ( that deal 16k damage in 1,8 sec) to regen back his focus.
And since Double tap is every minutes, and all classes got CC every minutes it’s already balanced.
And you can still use healing / reduce damage (prismatic barrier / healing / reduction damage ) if the pressure is too hight.
So when it came to the “hight burst” with Trueshot , it should match a burst adapted to the meta.
With all said above, the next patch on BFA ( or maybe shadowland if they keep the same value) must buff the Marksmanship hunter damage in PvP situation to join the balance in PvP up to :
127,4%
TL;DR : To make Marksmanship viable , MM hunter should be buffed to 127,4% of his damage.