Hey finndo77, thanks for the tips. Sorry for the late reply, been away for a while. I've learned how useful artillery can be, though I don't quite understand what you meant by the @ formation? Is it a spiral with the artillery in the middle? But that could take up a lot of space that I would need for Antiair.
My latest stats: Lvl 37 Stronger Explosives; Lvl 38 Rocket Reload; Lvl 41 Antiair Reload; Lvl 35 Artillery Reload; Lvl 31 Slowdown; Lvl 41 Health; Lvl 38 Starting Cash. Finally got all 83 achievements.
I just found a map layout that lets me get Perfect Game on Survival Mode with patience and care. No rockets! Just Antiair and Artillery, see the attached map. S=slow; A=antiair; M=artillery; T=teleport; G=gun turrets. 55 Antiair Missile launchers might seem like an overkill but I need them to survive far above my usual level.
The trick is to juggle land units back and forth along the route using the three gun turrets marked Yellow, Green and Magenta. I call them 'gates' because they regulate traffic.
Basically, I build a turret when I need to close a gate, and sell it when I need to re-open the gate.
Yellow is usually open. Green is open until the first unit reaches it and then I close it. This makes the whole column reverse and go the other way. When it reaches the Orange square at the lower left, I open the Green gate again, so the column reverses again. This makes the land units move back and forth through the long 'valley of death' lined with artillery.
Sometimes I let the column get past the orange square, then when they reach Yellow, I open Green and close Yellow.
Magenta is closed except when I get a whole row of flying saucers. When this happens, I close both Yellow and Green, open Magenta, then I replace the Cyan T with a block. This way, the saucers can't drop soldiers and I can keep re-arming the Ts and eventually kill the whole row.
So far, this map layout has allowed me to survive at much higher levels than my upgrades would normally allow.
Anyway, thanks to this thread I found out that you could use the VR A0003 map which gives much a higher score than the Basic Map, making my farming more efficient. That's a great improvement.
