DO 3.47c 3.11s 27 MCAT school list

So I know that my GPA is on the low side especially the science so it will be harder for me to get into a DO school; therefore I should I apply to several. But how many exactly? 7? 10? 15? 25? I was thinking about applying to 25 and then only filling out 15 of the secondaries to narrow it down.

What are your thoughts? how many schools should I send a primary to? How many should I send a secondary to? Here's my school list, you can recommend changes to it.

AT still KCOM
AT still SOMA
AZCOM
CCOM
DMU
KCUMB
LECOM E
LECOM B
LMU
Marian
NOVA
OSU
PCOM
RVU
UMDNJSOM
UNECOM
VCOM - virginia