*** Updated using more data - It didnt change much ***
To make compaire easyer I show what I expext player would get on avaridge if they spend 200 stamina. Sample size are much bigger ofcause.

10 spins at GHQ cost 200 stamina and gives:
3.8 triple Chance
1.8 triple Exp
1.3 triple Pero
2.8 triple Gift
0.3 non-triple
Total 2.8*N-Wild, 1306 Pero, 171 exp and 3.8 per 200 stamina.
(based on 130 spins)

20 spins at BONUS STAGE also cost 200 stamina and gives:
1.2 triple Chance
1 triple Exp
1 triple Pero
1 triple Gift
Total 1*N-Wild, 1160 Pero, 210 exp and 1 girls per 200 stamina.
(bassed on 80 spins)

40 Spins at 5-3 cost 200 stamina
4.3 triple Chance
3.6 triple Exp
2.2 triple Pero
4.2 triple Gift
Total 4.2*N-Wild, 1483 Pero, 210 exp and 4.3 girls per 200 stamina.
(based on 500+ spins)

200 Spins at 1-3 cost 200 stamina
20 triple Chance
20 triple Exp
10 triple Pero
20 triple Gift
Total 20*N-Wild, 1450 Pero, 210 exp and 20 girls per 200 stamina.
Only 1 quest at one time
(based on 1000+ spins)

100 Spins at 1-9 cost 200 stamina
10 triple Chance
10 triple Exp
5 triple Pero
10 triple Gift
Total 10*N-Wild, 1450 Pero, 210 exp and 10 girls per 200 stamina.
Only 1 quest at one time
(based on 500+ spins)


GHQ is better than bonus stage on all but exp - but exp dont matter much. For most quests GHQ is best too.
So I would pick GHQ and not Bonus stage.
GHQ is not as good as Area 5-3 (where spins cost 5 stamina) .
GHQ seem better than all the areas after 5-3 imo, but I need more testing.
All my N-girls are maxed so I get like 2500 pero from GHQ and just 1500 pero from bonus stage per 200 stamina. Big difference imo.

Problem with GHQ is that we dont have acces 24/7 to it.

Outside area with spin cost 1 or 2 and area 5-3 the GHQ are my facorits. 5-3 has 5 in spin cost and it is first area that allow 2 missions at same time.