I had decided to stop playing Warbook. It was taking too much time. As coins generated more coins, constant investment was needed, in other words, hourly husbanding of resources. Secondly, unspent coins were in danger of being lost through raids. As lost coins would constitute a percentage, a fraction of a small number would thus limit losses.
The game was deterministic and linear, limited by very strict obvious formulae despite the inclusion of a random factor. It was not to my taste after a while despite making steady progress. Thus I stopped playing.