This is very rudimentary math, and idk what the actual critical hit damage of a hunter is, but under the assumption a critical hit doubles damage (a 2x) multiplier, every 1% of crit provides 1% more damage for the player (more damage multiplies ALL damage the player does, as opposed to base damage).

Assuming a group of 3 hunters have 33% crit and output 1500 DPS each, they have a 67% chance to not crit. Under the assumption they get 5% crit from GOA (A vast overestimation), this would give them a 50 DPS increase each, which equates to 150 DPS across 3 hunters.
The math I used here:
1500 * (2/3) = 1000 * 1.05 = 1050 (this is the modified damage from receiving 5% crit, as 2/3 of the damage before was not critting but now is)
Of course, this isn't accounting for the increased base damage from the additional AGI to the 3 hunters in addition to the survival hunter providing slightly more AP to the 3 hunters. Under the assumption every 3 points of Attack Power provides 1 DPS, this would grant an additional 22.3 DPS per hunter (under the assumption every point of AGI equates to 1 AP).

Assuming both ret paladins output 1000 DPS and I output 800 DPS, WF grants a 20% chance to provide the user with another melee swing, which is a direct 20% damage boost to their melee damage and skills that activate on their melee swings (seals).
Assuming half of the damage these 3 melee DPS provide is just their auto attacks, not accounting for what they could gain from resources like rage, this would mean they do a net of 1400 DPS with just their auto attacks.
This means WF will grant 280 DPS alone. This is already 2.5x more DPS than what the hunters were getting.

Because we have an enhancement shaman twisting GOA and WF, this means the 3 melee will also get a DPS boost from the crit they receive. We'll assume that melee get a 1.5x multiplier to their damage from critting, instead of 2x.
Each ret paladin is doing 1100 DPS and the warrior is doing 960 DPS. Under the assumption each have 30% crit, there is a 70% chance for them not to crit. Upon gaining the 3% crit from GOA (a close estimation), this means each melee is getting 1.5% more damage at a 1.5x damage multiplier from criticals. This will equate to a 47.4 DPS boost from GOA.
The math I used here:
(1100 x 2) + 960 = 3160
3160 * 1.015 = 3207.4 - 3160 = 47.4
This means that the 3 melee will be getting a net total of 327.4 dps from WF and GOA as opposed to the 217 DPS from the hunters getting just GOA.

The damage provided to the hunters is also very liberal, giving them an extra 2% crit from GOA, a higher critical damage multiplier than melee (not even accounting for the extra +20% crit damage warriors get), and a 1:1 AP boost from each point of AGI which is likely unrealistic (idk, I don't play a hunter).
Even if all 3 melee were doing 20% less damage than what was used for this calculation, it is still a DPS boost. Instead of 327.4 dps, it is 261.92