Leafy Spring 28

I've tried all the formations I found here on the forum. My stats:
Behemoth 1500hp
40attack
8 def
Willy's armor with samurai naginata, scrap metal ring, eyes of flame ring
shattering strike, fire blast, sorrow smash, footman spirit
footman level 6
troll level 3
knight lvl 1
troll cyborg lvl1
archer lvl 3
ninja lvl 4
WR lvl 3
iron wheel lvl4
priest lvl 5
mage lvl 4
shaman lvl 3
archangel lvl1

I can't see what my research levels are because I"m upgrading critical strikes right now.
Any help will be much appreciated. I've been stuck here for 4-5 days now. So frustrating!!!

IW WR MG MG TR
IW WR MG MG TR
IW WR MG MG TR
IW WR MG MG TR
IW HE MG MG TR
IW RO MG MG TR

Boshix wrote:IW WR MG MG TR
IW WR MG MG TR
IW WR MG MG TR
IW WR MG MG TR
IW HE MG MG TR
IW RO MG MG TR

I had a slight variation to the above. Hero is the last two columns. ie.

IW WR MG MG TR
IW WR MG MG TR
IW WR MG MG TR
HE WR MG MG TR
RO WR MG MG TR

Unit Levels:
IW (6)
WR (2)
MG (6)
TR (6)

Loss all except for Hero and Iron Wheels

Berserker level 8, 1145hp, 45 atk, 6 def, Full Crazy set and Scrap Metal Ring

Spells: Fire Blast, Blue Blast, Sorrow Smash