rusty island all very strong and lethal

[loreangelicus]

There is a reason why there are guaranteed units on the starting islands:

Debir: royal thorns, royal snakes, inquisitors
Scarlet: archmage
Bolo: repair droid, guard droid

When having trouble getting no-loss or just having trouble defeating enemies at Bolo/Rusty use this lineup:

royal thorn/repair droid/guard droid/repair droid/archmage

The repair droids repair each other and the guard droid, the guard droid tanks, the archmage cast magic shield on the guard droids to make them tougher tanks, the royal thorn summons secondary tanks and dishes out a not-too-shabby ranged damage. Your weakest unit here is the archmage, which is not so bad considering he has a reasonable Defense of 24 and 140 HP.

Hope this helps.