I'm at 510. Stopped playing for a bit. The "heavy cruiser" wave is the only threat to me. It will blast through the entire first 4-5 lines of yellow wall and damage my Meltdowns a little, but has yet to get any further so they have a long way to go before they can annihilate me.
I see so I die exactly at 500 lol, not wonder cause my defense is not much and it run almost 100 waves without fixing anything. I play nuclear map which is really large so those Reaper can go play after pass my defense line lol. Poor my Plastanium i didnt launch them with pad. But get quite a lot of Surge Alloy though ..170k, although most of things are still in base. Thank again so now I've a goal to reach more^^ I have save at wave 3xx but I plan to rebuild it :p