There seem to be more ELWs within say 4000ly of Sag A* in general even taking star density into account. I found one high above the galactic plane on my way back down from Quemeou YE-A e0 (Altum Sagittarii Prime) and 3 others since without specifically looking.
Sagittarius A* lies well within the suppression cross (see
this map for example), and although that shouldn't really matter for mass code D boxels, who knows, maybe it does. What
is well-established by now is that the helium levels of a boxel are shared between all systems in said boxel, and they heavily influence what kinds of bodies you'll see. At higher helium levels, you'll see more gas giants with more moons, and as a consequence, the "valuable" planets are crowded out, so to say. At the lower end of the spectrum, you'll see systems with fewer gas giants, and the most "productive" (in terms of ELWs) boxels will have the lowest helium levels.
Unfortunately, this doesn't mean that "low helium = high ELW/Sys", rather it means that "high helium = low ELW/Sys, low helium = can be high ELW/Sys, can be low ELW/Sys".
For more info on this, data, charts and such, see
this thread.
Now, the galactic core has two characteristics that help here. One: unlike the rest of the galaxy, in the core there is a cap on how high a boxel's helium levels can go. (Which is why you see a hole on the
HRGG map.) So at least you'll come across fewer very-high-helium boxels as you go searching.
There's also a detailed breakdown of the galaxy's sectors
here. This isn't a boxel-level, but you can see the differences on the sector level too.
Two: since boxels in the core have so many systems, once you find a good one, you can keep farming it for a long while. Elsewhere in the galaxy, you might find a good D boxel but with only 300 systems or so. When you're done with those, then you have to find another, but farming a boxel with five digits of systems as opposed to three will last much longer.
As for the expedition and the result score - would a ratio of visited systems/ELW be a better metric. Otherwise it's skewed toward those players with most time at hand.
Well, if you score a ratio of visited systems / ELWs found, it's a measure of who had the most luck. (Plus you also have to set a minimum number of systems visited, otherwise someone could win by finding an ELW on their first system, and stopping there
) If you score total ELWs found, it's a measure of who had the most playtime. At the end of the day, any such competitions will have one or the other.
