70-200 f/2.8L, 16-32 f/2.8L II, 100 f/2.8L Macro
need suggestion for extenders... should i go for "2x extender iii" to gain extra zoom for my 70-200 f/2.8L
or is it better to go for 100-400???
Great start for what you want to do. The 100L doubles as an excellent portrait lens. You might want to consider the 1.4x iii instead of the 2x iii as the 1.4x iii is a bit sharper. Might also consider a faster portrait lens at some point (e.g., 50mm L, 85mm L, or Sigma 85mm 1.4).
1Dx, 15mm f/2.8 fisheye, 16-35mm f/2.8L II, 17-55mm f/2.8, 24-70mm f/2.8L II, 24-105mm f/4L, Sigma 35mm f/1.4 DG HSM, 70-200mm f/2.8L IS II, 85mm f/1.2L II, 100mm f/2.8L IS, 135mm f/2.0L, 200mm f/2L, 1.4x III, 2x III, 600EX RT (3), Einstein, Sony RX100 with Nauticam housing