King's Bounty: Armored Princess

I read it, but didn't find anything. How to navigate the first three islands at the beginning without losses if there is no resurrection? Inquisitors resurrect very weakly.

Firstly, you didn't search well.
Secondly, up to 4 islands may be available at once (including the rusty anchor), but this is if you're lucky.
Thirdly, on the rusty anchor, you can get a green dragon and complete the game with just it.
Fourthly, the rusty anchor may also contain black dragons and trolls.
Fifthly, if you don't have resurrection, that doesn't mean others don't. The map is generated randomly with each new game.
Sixthly, you can try to complete the game without the 4th island, using summoning fodder...