Martial Master not working..?

[Lukielucas]

Martial Master only works with Signet and steelshell usually only goes upto 300 anyway as used to be capped at 276 @ the tree but would've thought it'll cap @ 300ish anyway, you need to fight tougher mobs to get better skill up, just need to be decent challenge above

[Cyllene]

I could understand steelshells being low but the worms and turtles in gustav? I'll try the store tp method also. Thank you!