To win a game we need to dominate at least 2 stages out of 4. i.e movement, shooting, magic, and fighting. The most reliable stage for any army is movement, no dice rolls - except charges. Pure strategy and movement characteristics of your army. But most of our models are sloooow, so at best - we can counter the opponent's movement, but we can't out-maneuver them.
Shooting stage - lol. We are not elves, we do not have dorf cannons. Our skinks can harass, but - the lizardmen army is not a shooty one.
Magic - and that is the reason why we are always slightly below average. In theory - Slanns are the best mages in the entire game. But the problem is that when we are operating with random - on large numbers/dice - it's reliable. I mean that when we roll 10-20 dice - the result is +/- predictable. But with a low amount of dice during the magic phase - it's pure luck sometimes. And as a result - sometimes we can dominate the magic phase. But sometimes... We just suck, lol.
Fighting phase - traditionally - we had a tough army with strong lords that were able to grind through enemies. Not sure about our current stage - nerfs hit us hard. But, let's imagine that we are still strong and we can dominate this phase.
As a result - 1 out of 4 in 50%+ of games.
So, I would say, that the most resultative games that I played were with lots of monsters and saurus warriors (don't forget that carnosaurus and heavy cav/monster army is fast and can try to win a movement phase), and only skink priests as casters and (mostly) dispellers.
Ofc, it's just an option, but it worked for me
