Words that contain 't' and end in 'soi'

What's the max number of words you could construct using words that have 't' in and end with 'soi'?
Oh dear, there is only 1 word you're able to choose for words that have 't' in and end with 'soi'.

In Scrabble, what is the best score you can get using this list of words that have 't' in and end with 'soi'?
As there is only a single word possible, you can only play 'thiasoi' which totals 10 points.