I'd see if any folk in your area are into that figure size and period, and if so paint and mount your troops to be compatible with theirs.
If you're 'on your own', do some 'trial mounting' - cut some cardboard to base sizes, attach figures with white glue - put disliked mountings in saucer of water till glue softens. See what base size / number of figures you (and anyone whose aesthetic judgment you respect) likes.
Some years ago, some members of our club, who played WRG 6th ed. tended to stand over our DBA boards and make comments to the effect that it didn't' look like a war-game. I was tempted to make up some 6mm armies and put them on 60mmm frontage bases to demonstrate that it was possible to play DBA and make it look like "a war-game". Indeed to look just like a game of WRG 6th ed. (if you counted the number of groups of troops for a 1500 pt game, it was usually 12, plus or minus about three). But in the end I couldn't be bothered. Nonetheless, it would look distinctly less abstract.
I guess my only quibble with myself is that 10mm is obviously smaller than 15mm and so doubling up say Spears from 4 to 8 in would normally be 2 rows of 4. This representation would leave 'gaps' between shields etc. My potentail remedy would be to have say 5 in the first row and 3 in the second row and slightly uneven