No no no no. No don't do this.. stick with Allie. It looks so much better and people won't spell it wrong EVER. So yeah don't do this to a perfectly fine name!
The word sublime in the definition makes me think of sour lemons. It must be a sign that this isn't a good name for babies, because people will say "Aali!" and all I can think of are those sour lemons. Gross.