Hello all, Christian, someone local who works in Tourism in Madagascar !
A recommendation for trip in the Island : the west by river trip : Including Tsingy of Bemaraha, Alley of Baobabs, coastal trip from Morondava to Tulear. If you are passionate of nature, birds, adventure, this is for you.
Day 1 : Antananarivo
Day 2 : Antananarivo - Miandrivazo
Day 3, 4 : River trip on Tsiribihina river
Day 5 : Antsoroantany - Bekopaka
Day 6 : Visit of Tsingy limestones
Day 7 : Bekopaka - Morondava
Day 8 : Morondava : rest for beach
Day 9 : Morondava - Belo sur Mer (Three hours driving, beautiful scenery)
Day 10 : Belo sur Mer - Manja : Bivouac
Day 11 : Manja - Andavadoaka : beach
Day 12 : Andavadoaka - Salary
Day 13 : Salary : beach, best blue lagoon in the country,
Day 14 : Salary - Tulear
Day 15 : Tulear - Isalo
Day 16 : Isalo parc
Day 17 : Isalo - Ranomafana
Day 18 : Ranomafana parc
Day 19 : Ranomafana - Antsirabe
Day 20 : Antsirabe : rest, remembers
Day 21 : Antsirabe - Antananarivo - Airport
For more informations, you could look into this review :
https://www.tripadvisor.co.nz/ShowUserReviews-g673046-d5503141-r441022476-Tsiribihina_River-Tsingy_de_Bemaraha_National_Park_Mahajanga_Province.html#CHECK_RATES_CONT

Christian