Early game rush with Dwarves.

Hello.
I would like to discuss pushing with Dwarves (using Ingvar as an example). The problem is that I can't achieve battles without losses – I always lose 2-3 Dwarves as single units. It might seem like a small number, but in the end, the weekly gain doesn't cover the losses, and the stack doesn't grow; instead, it shrinks. The situation is even worse when I attack Archers – the losses are around 5-8 Dwarves, even with the Energy Rune.
Could you please advise me on what I'm doing wrong?