Our itinerary was this one...

https://docs.google.com/document/d/1ecqRaj_5uyRxJaVSHzetglB26rh1gss24DAi5MHjFww/edit?usp=sharing

We organised it with Kandoo Adventures who provided the porter and the guide.

My main tip for altitude would be to drink and eat as much as you can. You should be taking on about 4 litres of water a day at that altitude and if you don't it will affect your body. Theres no way of knowing how altitude is going to affect you. Im pretty fit and in Nepal i wasnt affected too badly with altitude (mainly just lack of breath), and that only occured at 5000m , whereas when we did Kilimanjaro, i struggled from about 3000m upwards.