I believe the beam was moving faster in my map because of a faster casting boss map mod, or some other such. I don't know, and don't care enough to try it again with "safer" map mods, the risk/reward is way out of whack and I'd rather just do any other map and get better drops without any risk of death.
Since you have 5400, sounds like at 5100 life I was a just barely too low to survive the beam, maybe it'll be an easier fight in a couple levels.
"Iirc iirq has zero to do with currency drops or card drops. A 68 map has nothing except the uniques that can drop snd random currency. Dried lake has exactly the same curry plus the headhunter card making it far superior even if you ignore the fact if you don't fully clear a map, it's inefficient."
That is wrong. Increased rarity doesn't directly increase currency drops, but it does a lot more yellows to vendor for chaos or regal recipe, and increases the chances of getting a drop that is worth selling or using.
Increased quantity absolutely works on currency.
Increased Item Quantity (IIQ)
Increases the average number of items that drop from monsters (aka Drop Rate). This includes currency, scrolls, skill gems and divination cards.[5] There is no cap on the usefulness of this modifier, since there is no limit to the number of items a monster can drop. Only the IIQ of the containing area and the party bonus affects chests or strongboxes,[6] and it does not affect the type, quality, or rarity of item dropped, only the chance that something will drop.[3] A player's IIQ does not affect the amount of maps that drop from enemies.[7] However, a map's IIQ does affect the amount of map drops.[8]
Since last night, I tracked my drops for the last few maps I did.
http://imgur.com/a/oWJsM
Not trying to brag, just showing that the drops from maps, compared to dried lake, are preeeety good overall. Sure, there is some variance, but I can absolutely sustain mapping like this, and my currency cost to roll the maps is trivial compared to what I walk out of the map with. Even if you ignore the RNG luck of getting an exalted orb in one of the maps, still coming out way ahead on currency.
One minor note: on the jungle valley map, I dumped my working stack of wisdom scrolls, those didn't drop in the map. I didn't bother with scrolls or perandus coins for any of the loot tabs because value is pretty insignificant.
These maps were either unID blue maps, or white maps I used an alc + vaal orb on. Most of them were around 100 iiq.