If you buy the Quaker and upgrade it fully and buy 3 Quake Boxes and upgrade them fully then you should last around 950 seconds or 16 minuets with 450000 money. [You can buy 4 gunmen if you want.]
This is Sparta [normal]
[When I done this I only won with 11 health so this make take a couple of tries.] Upgrade your wall fully.[Make sure you do this first.] Buy the Quaker and 3 Quake boxes and upgrade all of them fully.[You won't have enogh to upgrade everything so choose carefully!]
