I would give them to T.Ketola, T.Nieminen, Kiiski and Paukku.
Paukku will get one for sure
Kiiski should get one - he is no.3 in Finland this year and was 2nd round last year
T.Ketola should get one if he wanted to play
I fear Timo N. won't get a WC. I'm also not sure about Jarkko, is it sure that he won't play?
Even if not, Timo won't get one I fear.
Lassi Ketola is such a player who gets WC all the time. Last year in Geneva, Tampere and Helsinki + a DC nomination and this year in Tampere - and he hasn't played that good I think. Niklas Bucht is also an option - he tried hard this year and needs some help.
I just hope there won't be a bad surprise like Heliövaara last year. It was absolutely senseless to give him a WC for a Challenger.
So my final prediction is: T.Ketola, L.Kiiski, J.Paukku, N.Bucht