Converting to HTML experiences?

We are currently using another tool and are hitting several limitations, mainly:

1- Autonumbering support,
2- Word Art Graphics,
3- Tables of tables, and
4- Vertical vs Horizontal format

Has someone trying complicated Word to HTML conversions? Experience to share?

Thanks,
Thierry

Check the following spreadsheet to see our current Word to HTML conversion limitations:
https://docs.aspose.com/words/net/features/