On the 1 key, I have 1 and !. Maybe I could add ¹ and ₁, with AltGr and Shift+AltGr (or Ctrl, or something). Maybe ½ and ¼?
With Compose, I have ¹, ₁, ½, ⅓, ¼, ⅕, ⅙, ⅐, ⅛, ⅑, ⅒, ①, ⑩, ⑪, … ㊶ which involve the 1 key. I do not need to look up the sequences for these, as they're intuitive: Compose ^ 1, Compose _ 1, Compose 1 2, … Compose ( 4 1 ).
You could maybe use AltGr combined with dead keys to accomplish that, but I suppose it would be limited to combinations of two keys (plus the modifier).
EDIT: Actually, it seems Windows supports chained dead keys, so I think you could accomplish longer sequences with a plain old Windows keyboard layout definition too. But that's not supported with MSKLC.
On the 1 key, I have 1 and !. Maybe I could add ¹ and ₁, with AltGr and Shift+AltGr (or Ctrl, or something). Maybe ½ and ¼?
With Compose, I have ¹, ₁, ½, ⅓, ¼, ⅕, ⅙, ⅐, ⅛, ⅑, ⅒, ①, ⑩, ⑪, … ㊶ which involve the 1 key. I do not need to look up the sequences for these, as they're intuitive: Compose ^ 1, Compose _ 1, Compose 1 2, … Compose ( 4 1 ).