Pathfinder: Kingmaker

[Vllad]

I just find the RNG of D&D to be too harsh. Particularly when going up against single large enemies that can crit for almost the entire health of a full tank fighter. 

Problem 1 on that front is tanks are not fighters with shields. 

Tanks are classes that don't take damage. Those are Aasimar Monks, Human or Aasimar Rager Invuls (Barbs) and classes like that. You have to throw off shackles of standard MMO models and build tanks that are ONLY acceptable to Crits. i.e., they are only hit when the AI rolls a natural 20. Once you are in that position you get feats that reduce specifically the crit damage. 

The problem with fighters with shields is typically fighters don't get enough Dex bonuses given the high end AC armor to get enough AC to eliminate all non natural 20 hits. Also shield wearers don't do enough damage without very careful weapon/feat selection to add anything beyond mitigation worth it. i.e., if the tank can't solo the creature it is tanking with minimal healing then you are subject to too many random generated rolls. 

Try one more game with two tanks, 2 Rager Invuls or 1 Rager Invul and a Monk. 

Think of the fights as your two tanks are primarily going to kill the main target while your casters kill everything else and do the utility. A good Cleric and Bard can keep those two kinds of tanks up leaving you two other classes to play as you wish. 

The other thing to consider is multi classing. 

Watch the following video of a guy who solo's the game with a Monk, even if you don't like his style it will probably give you a better idea on how to multi class, solo, and build a proper character that isn't D&D intuitive. 

https://www.youtube.com/watch?v=ilM7Kf2cYwU

This game should be beating you on Kingdom side of things, not the character side of things unless you aren't optimizing properly.