interesting approach, Donny -
thanks for sharing

indeed, in-universe it doesn't make much sense how vong force immunity and ysalamiri function as compared to the game interpretation...
it could be the basis of a houserule.
vong haven't been abused locally to that extent since the era of NomBomb squads
that, and with present meta being ~50% autodamage in the form of Missiles 40 or grenades 30 etc,
its just not been too much of a mismatch scenario
I don't see force immunity being why Vong are more powerful -
its their damage reducing capacity and those danged thud bugs or razorbug barrages...

Ysalamiri floor rules were errata'd and tweaked somewhat,
around the same time as Poggle and the points cap on lowest cost of piece in a competitive squad.

Things such as Force Maelstrom, Master Speed, Force Leap, Force Burst, Force Wave, Force Lightning etc,
even whirlwind attack, lightsaber riposte, lightsaber throw, lightsaber block, lightsaber defense or lightsaber assault... if you think about it -
the force is not acting upon the Vong, it just empowers the jedee to swing more etc.

Nearer to Kryptonite-Ysalamiri, jedee go weak at the knees,
but Vong weren't depicted as Kryptonite-level nasty.
Ysalamiri also came at a cost -
predators would easily go for the vulnerable slug,
and species which could sense pheromones etc could easily detect ysalamiri locations...

all that stuff oughta still effect a Vong.
things such as Mind Trick, Force Alter, levitate, force push (which represents "Move Object" from the RPG)
etc,
those probably shouldn't effect the Zonama Sekot-ans/Vong

You can currently use Lightsaber Throw against enemies with Force Immunity. It grants the user attacks and thus it acts like Lightsaber Assault. So feel free to throw your lightsaber at swarms of Vong all you want! I saw this come up in a Tile Wars match where my brother had the 100pt Luke and was going against Thrawn with his Ysalmri bubble. Luke won the matchup and it was thanks to Lightsaber Throw.

I have always thought that jedi should be able to use lightsaber block/defense against vong. I think its just silly that jedi that rely on that lightsaber block/defense cannot defense themselves at all.

It has been said before that even in the stories (which I have not read), part of how the Jedi were so amazing at defense was sensing their opponent's next move. They could not sense the Vong, so it was much harder to anticipate how exactly they should defend next.

But that explanation only goes so far, there's still a lot to be said for experience and intuition in general. Folks like Mandalorian Blademasters don't rely (or even use it!), they rely on training and experience.

This brings up the problem that Parry only further outdates Lightsaber Block because a Jedi with Parry is doing the EXACT same thing as a Jedi with Lightsaber Block, but one costs Force points and the other does not.

@EmporerDragon,
I'd have to agree, if it's not a hypothetical on rules, general or misc cover this excellent discussion.
It was awesome to see how FI and Ysalamiri were intended to function though,
for future ref etc.

@all,
it seems some different interpretations of how to play/rule FI are there,
though in official games, LThrow etc are permissible,
which was great to have clarified.