Some updates:
1st regalis sac - Just short of 100 slings.
2nd regalis sc - 76 slings
striata - 1st instars - Looks like around 100
1st fasciata - 1st instars - Looks like around 130
2nd fasciata - eggcase still with mom. Will leave it there till I wake up with spiderlings on the ceiling.

formosa - 2nd/3rd instars - 62 made it through
miranda - 2nd/3rd instars - 38 made it.
A quick note or those breeding pokies that only start eating at 3rd instar (formosa, miranda, metallica, etc)
Even though these aren't suppose to eat until 3rd instar, they most definately do at 2nd instar already. Lost around 30 miranda after leaving them together at 2nd instar and when I went to go check on my formosa this evening, the 2nd instars were snacking on the freshly moulted 3rd instars.

Luckily looks like I only lost 5 or so formosas to their brothers and sisters.
I suspect that if the eggcases were left with the mother and she raised the slings, she would feed the 2nd instars (Like balfouri do - uncle scarab has witnessed this) which might stop them from cannibilising their siblings. I am also taking a guess that lots of other spiders would possibly "feed" their 1st instar babies. No proof of this, but I will monitor my fasciata when I feed her while she has 1st instars in the nest, if all is successful of course.