Hi there,
To answer your questions:
1) No I would not offer more daytime BFs, every 4hrs is appropriate for her age
2) I would also not offer her solids before bed, she is getting plenty with 3 meals per day
3) I would try bedtime at 7pm
Your routine looks pretty textbook for her age. 5min BFs could be normal for her, my LOs were only feeding 5min at a time at that age and were getting enough milk. The NWings could be related to something other than hunger, like teething, or perhaps she is having a growth spurt. You could try posting on the nightwakings board if you have more specific questions about them.