Good day,
Historically. Gliders that were shot down did lose all on board, and crash landings accounted for some numbers as well.
Besides being an expert at planning you also need a big horseshoe up the wazoo.
The few times a have put in an Airborne Assault, all suffered heavy causalities, none were able to move far from the LZ, however they did cause the enemy to move prime assets away from the ground assault and speed up the victory. However with causalities so high, they were marginal victories at best. Glider troops seemed to always fair better, but heavy equipment always seems to get whacked or an AT Gun would land but the jeep wouldn't make it. The one time a tried a night assault 150m visibilities, it was a complete failure. Most survivors only did so because they landed more than 1500m from their LZ's where no enemy was!
With all that they are still interesting to attempt all and all given the right situation I don't discount them.
Now FJ Airmobile, that is interesting to try, just remember to be in the weeds and don't forget The Ride of Valkyie!!!! MUUHAHAHA!!!
Bob out