i think i've found the build to win?
start off with aoe skillers, kill as much as you can each round (see there's a time limit, but no mob limit). No need to upgrade your aoe skill damage, its likely gay enough already, unless its unable to 1hit the 1st boss mobs. Just keep adding the skill level.
1st boss = unlimited time, unlimited mobs. Farm as long as you want, really.
meanwhile most of your cash should have gone into armor to survive easily
now start going into DPS mode, getting in the following order:
+number of attacks
+number of targets / +attack speed
+armor penetration
while still getting lots of armor
idk if it applies to all guys, but the blinking skill increases damage by 200 at max level.
increase the duration as you see fit, 5 sec is really not enough.
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i beat level 20 using 50+ armor and the following:
max no. of attacks
max no. of targets (needed for farming)
max attackspeed
max armor penetration
max duration on blinking skill's buff
base damage was around 200 (just keep adding this while killing level 20, since you cant get any more armor and have nowhere else to spend cash)
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strat:
just focus broodmother (leviathan) and use meditate every now and then.
forget the above info, its outdated version of infested arena.