rusty island all very strong and lethal

[KongMysen]

You need to support us with some more info. Which troops are you using? Spells? Items etc.

Have you managed to win no-loss fights to earn the leadership medal?
Are you able to buy any lvl 5 troops, or +leadership items.
Do you possess a "Call Colossus" or Call of Death" wanderers scroll?

Some tips

-Search any shop on the 5 islands to see if you can find "better" units
-Search for items, which will suit your hero troops

Troops who work well in most lineups.

-All lvl 5 units, especially dragons and trolls
-Any troop, that summons troops. Especially Demonologists, Druids, Royal Griffins
-Paladins

Lvl 5 troop + Stoneskin + heal can get you past most troops. Lethal armies aren't really lethal if your troops are better survivors