I checked the lines again and I don't know anymore.
The reason why I chose the leningrad in the first place was to be able to play for a win no matter what and to have a decent position in all variations.
I play the taimanov against e4 and it seems fine even in the Qf3 line. No difficult sideline. I couldn't play the najdorf because of Bb5!? against which to play for a win I'm forced into Nd7?! A move that leads to concrete problem and a subpar opening.
So why am I skeptic about the dutch :
1. d4 f5 2. Bg5 g6 3. Nc3 Bg7 4. Nf3 Nf6
This position is unavoidable in the g6 line.
It leads to this :
1. d4 f5 2. Bg5 g6 3. Nc3 Bg7 4. Nf3 Nf6 5. Bxf6 Bxf6 6. e4 fxe4 7. Nxe4 d5 8. Nxf6+ exf6
Not a very combative variation for black...
So I'm forced to play h6-g5
This variations : 1.d4 f5 2.Bg5 h6 3.Bh4 g5 4.e3 Bg7 5.Bg3 c5 6.c3 Qb6 7.Na3 cxd4 8.Nc4 Qe6 9.cxd4 Nf6 10.Ne5 O-O 11.Ngf3 Ne4 12.Rc1 d5 13.Nd2
Lead to this position :
I must admit, I don't understand the position. I don't know if I'll be able to fight for something with black or not.
This line : 1.d4 f5 2.Bg5 h6 3.Bh4 g5 4.e3 Nf6 5.Bg3 d6 6.h4 g4 7.Nc3 Nh5
leads to :
which is interresting but if white play 6.Nc3! you don't have any spare move. So you have to transpose into Bg7 line (if you play e6 he can play the h5! plan)
This line : 1.d4 f5 2.Bg5 h6 3.Bh4 g5 4.e3 Bg7 5.Bg3 c5 6.c3 Qb6 7.Na3 Nf6 8.Nc4 Qe6 9.Ne5 Nc6 10.Ngf3 Nxe5 11N.xe5
leads to :
Again I don't understand the position. I don't know if I can try to play for a win or if this is the type of position where you have so many weakness your only option is to hold the fort.
I don't know if this position is better than the Nd6 one from above either.
Finally this line : 1.d4 f5 2.Bg5 h6 3.Bh4 g5 4.e3 Nf6 5.Bg3 d6 6.h4 g4 7.Nc3 Bg7 8.Bc4 Nh5 9.Nge2 e6 10.Nf4 Nxf4 11.Bxf4 Nc6 12.Bg3 O-O 13.Qd2
leads to :
which seem interresting but 12.f3! lead to these one :
1. d4 f5 2. Bg5 h6 3. Bh4 g5 4. e3 Nf6 5. Bg3 d6 6. h4 g4 7. Nc3 Bg7 8. Bc4 Nh5 9. Nge2 e6 10. Nf4 Nxf4 11. Bxf4 Nc6 12. f3 e5 13. dxe5 Nxe5 14. Qe2 c6 15. Bb3 Qe7 16. O-O-O Be6 17. fxg4 fxg4 18. Qd2 O-O-O 19. e4
And again I don't know. Lots of weakness