For a first Saison I'd just go with you're malt, a lb of sugar and skip the fruit entirely to get a true feel for the yeast. I'd skip the crystal too if you want a nice dry saison. If I was gonna use fruit, I'd probably freeze it first. I'd add fruit to a secondary and I don't know how strong the mango would come through. But, its up to you. I've not used cardamom but I've been cautioned its very strong and to go easy.