A simple suggestion: "I want that, too" can be something like "and I want that" (Ahrk zu'u laan daar)

Another suggestion: "Med ..." (like him/her/this/that/etc.) For example "She is a warrior. You are a warrior, too." -> "Rek los kendov. Hi med rek los kendov" (She is a warrior. You, like her, are a warrior.)