If what you said is his army he is not going decurion... it is almost there though. The majority is, but that barge and destroyers make it have to be CAD or Unbound. Make sure his list isnt using rules it shouldn't be. He would have a canotec harvest and reclamation legion but then no hq for the barge or troops to make it work.
Remember formations are counted as detachments in there own right. Unless he goes decurion, but then everything he buys in that detachment would have to be bought from that list given. He can not say that because he has X Y and Z units in his army he counts as having those rules but can freely add heavy support choices or whatever to that army. 1HQ unit in that list means he had to go CAD or Unbound. If he went Unbound he would not get the decurion bonus, EVEN IF he took the reclamation legion and harvest he looks like he took What could have made one.
I would not recommend the knight as he will just gauss it down. Vindicator are always good for fighting them but you will need a 3 or so as they will be priority targets for him. At S10 Ap2 it will both ignore armour and take the reanimation down by 1 (what if he isnt decurion would be 6s).
As said killing that spider is a big thing if he has gone decurion. But if not then splat those wraiths with the demo cannons and they are instant death if they fail the 3++ then reanimate on -1. Though the wraiths aren't always your best target because of that save, it depends how clustered they are.
Otherwise removing whole squads of immortals, warriors or tomb blades will stop him holding objectives.
Either way, new marine and dark angels books look to be coming in the next month or so. So you might end up with some fancy new toys like grav guns to eat those wraiths up with.
Remember formations are counted as detachments in there own right. Unless he goes decurion, but then everything he buys in that detachment would have to be bought from that list given. He can not say that because he has X Y and Z units in his army he counts as having those rules but can freely add heavy support choices or whatever to that army. 1HQ unit in that list means he had to go CAD or Unbound. If he went Unbound he would not get the decurion bonus, EVEN IF he took the reclamation legion and harvest he looks like he took What could have made one.
I would not recommend the knight as he will just gauss it down. Vindicator are always good for fighting them but you will need a 3 or so as they will be priority targets for him. At S10 Ap2 it will both ignore armour and take the reanimation down by 1 (what if he isnt decurion would be 6s).
As said killing that spider is a big thing if he has gone decurion. But if not then splat those wraiths with the demo cannons and they are instant death if they fail the 3++ then reanimate on -1. Though the wraiths aren't always your best target because of that save, it depends how clustered they are.
Otherwise removing whole squads of immortals, warriors or tomb blades will stop him holding objectives.
Either way, new marine and dark angels books look to be coming in the next month or so. So you might end up with some fancy new toys like grav guns to eat those wraiths up with.