I hate to see others struggle with this so I have come to share my solution for this problem.
As stated in the previous posts, the only method to alleviate this is by creating extra info_survivor_position entities given with the same coordinates from the ones lodged into the map and enabling god mode on them (in case of the presence of ability giving plugins like I said before).
There is also no need to alter the "m_currentReviveCount" netprop nor teleporting the extra survivors back to the saferoom since the game already handles that as long as there is enough escape positions for all survivors. Keep in mind that there are several maps that are picky and want the survivors to be in those spots in order for them to be counted as survived and that is why going by the old method doesn't always work 100% nowadays.
I have been relying on Stripper all the time and I never once saw anyone who made it to safety being reported as dead by the time the outro stats come up. The only time I had to use a plugin to teleport the extra survivors to the escape entities is whenever No Mercy is played cuz some still fall out of it despite getting in the helicopter.
All I did was add those said entities equal to the maximum limit of survivors. Dark Carnival is tricky as well as some other finales cuz they required a few modifications to other entities that are tied to the survivor positions.