[quote=Waterpls]Is there a point in Rob a drunk or better wait for Gift card to spend Someone is Coming?
In my situation
Rob a Drunk: 4.02E for 6 CP = 0.67 E/SiC (w/o rare success)
Gift card: 13E for 21 CP = 0.61 E/SiC (souls converted with Spirifage)
So in terms of E/SiC Rob a drunk better but i cant figure out is it better in terms of EpA and/or opportunity cost?
My basic grind is Spirifage ~1.75 EpA
edited by Waterpls on 3/16/2018[/quote]
I’ve ran the numbers before, including the action costs of acquiring & turning in SiC. I don’t have the full numbers on hand, but the short version is… Robbing a Rat is most profitable, only because of rare successes. I don’t know the exact drop rate, but even if it’s as low as 2%, that more-than-doubles your expected earnings.
The following is a rough reconstruction of how I came to this conclusion, using numbers from your post or from memory rather than checking everything. From what I remember, the differences are big enough that estimated values are good enough.
If you are a Spirifer than your "Replacement-level Action" is worth 1.74 EPA (I think?). One way of thinking of things is that any time you spend an action, that "costs" you 1.74 Echoes, since that’s what you could have used that action for instead. So an action that nets 4.02 Echoes really nets you a ‘profit’ of 2.28 Echoes, after you discount the Echo value of the Action you spend. So, ignoring the rare success, robbing a rat converts a point of SiC into a profit of 38 pence.
Meanwhile the Capering Relicker gives you 13ish echoes for a single action, for a net profit of 11.25 or so. Even if you play things suboptimally and spend 21 points of SiC instead of the minimum of 10, you convert at 58 pence per point of SiC. The fact that it takes fewer actions is a big differentiator.
But, as noted previously, the Rare Success from the rat is actually a big freaking deal. The Wiki seems to think it’s a 1% drop rate, but that one drop is worth 230 Echoes. This increases the expected value of your earnings by a whopping 2.3 echoes per robbery (minus 4 pence). At an average return of 6.3 Echoes per Robbery, minus 1.74 echoes for the action, you get a net profit of 4.56 echoes, which is 76 pence per point of SiC.
In summary… the optimal choice depends on your personal, subjective relationship with the RNG. The rat is technically more profitable, but literally half of your profit depends on how often you hit a 1% rare success. Personally I think of it as like the Fidgeting Writer but more humane: I’m staking profit on the mercy of the RNG, but on a bad day instead of walking away with nothing, I get a consolation prize that’s actually good. Technically suboptimal, but still better than even spirifage. Still, if you’re averse to banking on rare successes for money, accept the gift from the Capering Relicker instead.