What is the best or simplest method of adding my companys already drawn titleblock?

we X-ref as an attachment the title block with the information that does not change Project name date engineer's seals things like that. the rest of the information used on the title block is done as a block attribute per page ( page number, scale, designer, ect.)  I hope that helps.

Best is to use xrefs.Simplest may be to just make up a template drawing with it already in...The benefit with xrefs is that the drawings will be smaller in size and you can change it centrally.

We can also insert the standard title blocks from another cad drawing. Go to > Insert> Layout> Layout from template...(*.dwt) or (*.dwg).
 
Rman.