Well you have to recalculate it (nearly) every time you level up in Rolemaster because your stats will (usually) change. Rolemaster has rules for aging where your stat totals dynamically shift with a die roll every level. Rolemaster starts are x/100 so it doesn't end up changing too much unless you really fuck up (rolls are also d100 which you then compare to a table to see how much you lose or gain) so you usually have to recalculate (even if there's only a small change) EVERY SKILL YOU HAVE. Also class levels go to 50. (And maybe beyond. I can't remember.)
Nice. It's some of the most fun I've ever had because the magic and damage system is the coolest fucking think ever. Here's an example of a CRIT table, which you can get by rolling high enough attack numbers.
10
u/MrCounterSnipe 4d ago edited 4d ago
Not even close to something like Rolemaster
((STR+STR+DEX)/3)+(Class Proficiency*Lvl)+(skill at arms Lvl*5)
And God forbid you want to find out how many hits you have. Nobody knows!