Rolemaster Criticals converting to 5E

[anemeth]

Was hoping for guidance and feedback as I endeavor to convert Rolemaster Critical Charts over to 5e rules. The rules I am using for conversion are attached: Better clarity here19346

[anemeth]

The lowest level of unarmed brawling criticals is attached: 19344

Fixed Roll 100 so that the foe is paralyzed 2 days (half on a DC 10 Con Save) and creates an interesting scenario for a party that gets that against them with no lesser restoration or better healing spells.

[anemeth]

The most severe level of unarmed brawling crits is attached: 19345

[anemeth]

Magic Spell failures is a rule I am having issues with...attack spells can fail and/or miss, but others cannot. What do you guys think about a rule that a d20 is made for every spell and on a roll of 1 or less it becomes a fumble/failure? Modifiers could be spell level as negatives and stats (pending spell casting ability) for bonus.

[Trenloe]

What do you guys think about a rule that a d20 is made for every spell and on a roll of 1 or less it becomes a fumble/failure?
The wild magic sorcerer does this. Check that out for inspiration.

[anemeth]

Ya to make the sorcerer stand out, I was thinking they have the wild magic table (either positive or negative outcomes) for a 1 and for a 20 use the crit charts and other character classes get negative for a 1 and positive for a 20.