The plan for the pyskers is mostly just to stay in cover with conceal and fortune to soak up firepower and buff my other units with guide, fortune or doom as well shut down my opponents psychic phase as much as possible. I normally run 2 or 3 farseers so I'm not sure how well that plan will work with just one. I've never used a spirit seer before ( don't even have the model was just going to use a farseer model) he's mostly there to make the wraithguard scoring. I want to give the wraithguard d-scythes so there isnt much point of the spirit seer being close to them anyways. I charged my seer council at an imperial knight special character and killed it so I guess they can also charge any armour that gets too close. Also they are there because they're pretty much the only thing besides the paint job that makes this army ulthwe
The scatter laser isn't glued to the wraithlord (it's magnetised where his hand used to be, old wraithlord model) so I could definitely consider giving him a second bright lance, usually the scatter laser is just there to make his bright lance twin linked so having a second one is probably a better idea.
I only have three jetbikes :( I'm going to get more soon, it might even be my next purchase.
I don't think I'll be converting any warlocks on jetbikes any time soon because I can't find an easy way to do it without greenstuff (I don't greenstuff) But I agree with you it would be great for the unit.
Do you see any way of freeing up points for those d-scythes?