Well, it seems that the problem is the compiler itself. I modified k_inc_force.nss and it with k_inc_debug.nss and k_sp1_generic.nss with the Aurora tooset script compiler and everything seems to be in order.
Initially, when I compiled with HazardX's compiler, i wasn't able to use destroy droitd but with the toolset it runs without problems. I haven't checked if Juhani would continue to cast Master Valor all the time because I just arrived on Taris but if you want to check , here are my modded files:
http://jupiter.walagata.com/w/d333/scripts_force.rar)
You will find k_inc_force.nss and the compiled K_sp1_generic.ncs
Just drop the latter one in your override folder.
NOTE: I modified k_inc_force.nss for testing purposes only and added silly values in there just to see if it would work (debug): you'll notice that when you use force wave, the ennemies stay suspended in the air for 20 or 40 seconds ( I don't remember what value I added).
If you don't have the Toolset, I can compile your modified force powers scripts. Just let me know. :)