Okay so I've been playing with Gregtech even farther now and I've gotten to Iridium level. I'd like to suggest some balance tweaks to my previous recipe suggestions (playtesting is always the best idea).
The only change is regarding the Force Field Emitter. Instead of requiring 4 Iridium plates per, replace those with Tungstensteel Ingots. (Original reason for the plates was structural stability and tungstensteel is tough stuff, but it wasn't available at the time)
Two reasons for changing them:
Maybe the recipe is a little TOO hard.. I know they shouldn't be a cakewalk, but 128+ iridium ore per jetpack is a little.. much...
It gives tungstensteel more uses, which also inadvertently gives the Vacuum freezer more uses. It doesn't change the tier flying is in, since you need the infastructure to even build a vacuum freezer in the first place(2500K+ blast furnace, chrome city).
Do you, and anyone reading this post using the Gregtech recipes, agree? I think it would be a nice tweak.
Trust me fellow hardmode players, I've not gone soft on you yet :p