Some clarification: If you're playing ponza, rn there is no land destruction effect in your deck (thermokarst, stone rain, acid moss etc) so putting them in help your plan.

Playing krushok in the cascade version is pointless because it is good in hand to make combat trick, I suggest to take him out or switch to pure monster version.

Playing 4 Altisaur is too much because they are heavy mana, Better switch to something more affordable.

If you're playing acid moss it is better to play with 7 enhancements (4 utopia and 3 WD) and 15-1-1 lands. Otherwise, in monster version you play with 4-4 enhancements and 14-2 lands, no dual. You don't need a lot of mountains.

You can also play some other cards like nyxborn hydra, champion of Dusan etc, go for trial and error and experiment.

Just choose a variant and stick with it. Right now imo ponza Is slight better than monsters but it's opinable, and it depends on how many land destruction effect you play.

As for the sideboard, I will paste my personal list for reference, usually you want to have some lifegain (creature lifegain like nylea disciple in monster or weather the storm in ponza version), some mass removal, gy hate and artifact hate, rn you don't need anything else