How do you plan on delivering your webway portals? I recommend you check out this topic on
WWP tactics in 6th.
You can only have 50% of your army in reserve rounding up (not counting things that have to start in reserve, eg flyers). Not sure if this list meets that requirements.
PGL are great on wyches, as they give you +1 to cover saves when within 8" of your enemy, this is great as it can be combined with charging through a screening for a 4+ cover save. Not to mention it softens the blows of counters attacks. So keep them!
Not sure whether wych weapons are worth it now that they can get killed so easily.
You don't necessarily need all those flicker fields as vehicles have 5+ jink saves when they move (though a 5+ invulnerable save can be helpful if there is not enough cover for you raiders to hide behind on your first turn). It great on Razorwings though, as it means they never have to evade.
Hope that helps.