How far did you guys proceed up the Tower? On wave 15 the big bony boss (weak against fire) appears at the same time as the dragons (weak against ice) and overwhelmed me.
TIPS: (1) Drop rate + 300% means if the initial rate is 0.01% it then becomes 0.04 % (you know, grows 4-fold). At around luck 70 you reliably get drop for every kill. (2) Put every point in STR **OR** CON. CON cannot be trained, but STR lets you kill things faster. Anyway it loses importance later on as you gain stat growth rate when you kill golems. (3) Don't try to level quickly, it only gives you a few stat points and skill points. You can buy skill points with potions, while stats growth can be gained by killing Golems (150+). It makes a lot of sense leveling up having 300+ stat growth rate in everything than having 1.0 or 3.0 stat growth. For this reason, stay away from King's game until later. (4) Always prioritize weapons. At around Steel Sword +500, farm Calliste; start upgrading Calliste Sword and put steel in armor. (5)Increase your attack rate by farming and upgrading items, not by leveling up. Check out my stats here http://prntscr.com/3wwvm6 ; http://prntscr.com/3wwvsi
If you train a single stat, it takes about 7-8 seconds to up 1 stat (Auto train speed is 4 points every 70 seconds). Training speed doesn't drop much at higher stat level. So, with a simple auto click tool, you can level up 5k-6k points in 12 hours. And you get to choose which stats to level.
My result
Level: 213
STR 7196
DEF 4282
SPD 3180
DEX 2796
CON 1929
LUCK 116
ATK 3.9 mil
Armor 5.7 mil
Weapons
Calliste Sword + 742 (Stat + 11000%)
Steel Armor + 2109 (Stat + 15000%)
King's game round: 25 (I stopped bothering with it when I figured out Golem also give stat rate boost but much lower XP)
Tips for people who keep losing survivors: (1) Assign no more than 4 people for better chances of going undetected, (2) Melee is the most important stat for increasing chances of going undetected and surviving attacks. My search team have stats like these (Shooting/Melee/Searching): 1/2/3, 1/3/2, 2/3/1, 1/3/2 (i.e 3 with 3 melee, 1 with 2 melee). My percentages are 52%, 80%, 85%. I lost a grand total of 1 survivor after 40 days.
I notice before crashing the process "Plugin Container" use up 600+ Mb of RAM. Before going on an important raid, make sure you close and re-open the browser. Clear browser cache if you need to. It does not completely eliminate the chance of a crash, but it doesn't hurt to try.
 "Witch Hunt"){kind=icon}
 "Thrones of Fantasy"){kind=icon}
 "Dead Zed 2"){kind=icon}
 "The Last Stand: Dead Zone"){kind=icon}
dragons/wyrms? frozen in time spell.