Book of monsters is the best slot to gamble but only if you are playing with extra bet. The bonus triggers on just three scatters instead of the regular 4 so you get more chances to gamble.  I stop gambling after I get 6 spins and happy to take any of the premium symbols. 

Extra Chilli, Cherry Pop etc are my favs. Cherry Pop getting 12-16 spins with 4x multi adding on with every win after reels are maxed is a sick sweat. Can be at 50x multi with 3 or 4 spins left sometimes.

In which you gamble for a chance to get better free spins  (e.g. higher multis, more spins  etc..) This made me want to punch the screen in Razor Shark Returns, but it seems alright with this new Prag game, Fury of Anubis. One difference is the former doesn't tell you the odds and the latter does, also the gamble in RSR is definitely a lot worse odds than 50/50.  Do you like it?

I had several 500 spin streaks with no bonus too, not that unusual ie I get that somewhat often on some 10000x max win pragmatic titles. I will possibly take another crack at this near the end of the competition, GL on clearing that bonus Marius

196x with an rtp of 72% on 11,5k spins this is the best spin. makes nlc games look like a childs birthday