I'd rather mainly use mercury. It's slightly better for me in general.

I personally choose apollo.

10% of refund is always nice when you do UW.

72 expeditions with costume + 10% chances of refunds in my eyes out beats the mercury. It's really down to luck of how many expeditions apollo refund

Here is an example with easy underworld costume:

Let's compare them and say you get 8 new expedition points every hour.

The expedition opponent you take gives you 10 exp points without the expedition bonus.

So 10 exp points with bonus gives you 13 exp points.

You get 1000 gold each fight and 1300 with bonus.

+10% chance to find an item with bonus.

+20% honor let's say you get 1000 honor normally and 1200 with bonus.

And yes, I'll say you do ALL the points and most ppl have all the bonus for the opponent they farm.

With mercury you get 48 points with easy underworld costume. That's 192(8x24) points + 48 = 240 total points during costume.

Mercury makes all the expedition bonus double.

So you will get 16 exp points with mercury.

1600 gold

You'll get one item anyways

1400 honor

Gives a total of:

16x240 = 3,840 exp points

384,000 gold

336,000 honor

240 items

With apollo you get 72 points with easy underworld costume. That's 192(8x24) points + 72 = 264 total points during costume.

You have 10% chance of not using a points, so I'll give you the 10%. Since it avg. out over time. So 290.4 points (264*1,1)

Gives a total of:

3775,2 exp points

377,520 gold

348,480 honor

290.4 items

+might give you an extra free chance in the underworld.

So mercury and apollo is very even.

I'd say mercury is slightly better in the exp way and apollo is slightly better for gold (more items) with easy underworld costume.

Without costume mercury is just a little better in all ways for most of the game.

Apollo is a good option if you often are full on points. Since the difference is little.

In some parts of the game you might be better of switching between them. It's really up you the speed you are playing on.

During events like this (extra opponent) or "faster regen of exp points" mercury will be the best option and even better if you reset.

Apollo is much better these days, well since underworlds costumes were added.

Uhm.. I don't share this opinion. Can you explain?