Zheng is claiming she's been confirmed about Sofia. That came before Venus' win in Luxembourg. So, Kanepi might have withdrawn. Also, V said she'll be on Tour of Africa with Serena at the week of Sofia. So, if these are truth, Daniela got the 6th spot.
Generally, we need Kanepi and Venus to withdraw.
Sofia will offer at least 75 pts (I think) with no RR win. So, Daniela will definitely add some points and move up the rankings. Year end rankings are equal to the Race Points
So, If she plays in Sofia, she will secure a Top 30 finish!