[regexp] Rewrite v Nginx ali Apache

živjo!

imam en problem z regexp rewrite-om URLja.
imam več kombinacij URLja:

/lyrics/artist/title.html => lyrics.php?artist=$1&title=$2
/lyrics/artist ALI /lyrics/artist/ ALI /lyrics/artist.html => lyrics.php?artist=$1
/lyrics ALI /lyrics/ => lyrics.php?artist=  (kle pač mam generiran Not Found error)

trenutno imam takole na APACHE:

RewriteRule ^lyrics/([^/]+)/([^/]+)\.html$ /lyrics.php?artist=$1&song=$2 [L]
RewriteRule ^lyrics/([^/]+)\.html$ /lyrics.php?artist=$1 [L]
RewriteRule ^lyrics/([^/]+)/$ /lyrics.php?artist=$1 [L]
RewriteRule ^lyrics/([^/]?.*)$ /lyrics.php?artist=$1 [L]
RewriteRule ^lyrics$ /lyrics.php?artist=$1 [L]

ali NGINX:

rewrite ^/lyrics/([^/]+)/([^/]+)\.html$ /lyrics.php?artist=$1&song=$2 last;
rewrite ^/lyrics/([^/]+)\.html$ /lyrics.php?artist=$1 last;
rewrite ^/lyrics/([^/]+)/$ /lyrics.php?artist=$1 last;
rewrite ^/lyrics/([^/]?.*)$ /lyrics.php?artist=$1 last;
rewrite ^/lyrics$ /lyrics.php?artist=$1 last;

Ta zadeva sicer deluje za vse kombinacije, sam me zanima, če je kaka bolj elegantna rešitev... da bi se mogoče kej združlo v en string.

Hvala!