I would try to get a third Heavy Destroyer in there. 2 of them are easy to kill, but 3 makes it alot harder task, and as you really dont have anything else that is Heavy, every Lascannon are going to be aimed at them, so you will have to relie on there WBB and not there save.
Other then that, nice list. I love the classic lord, and his uses far out way his cost. I would not use the veil as a offisenive weapon, unless the other army is lacking in high S ranged weapons, and you can get back to your main body of troops before combat. If you face a Ork/sisters/Khron army (limited high S ranged weapons), you can Veil first turn, blow something up and the get back to your line (maybe a 2nd target). But do not keep him away if more then a very few high S weapon are in range/LOS of your warriors, as the Res orb is what keeps them alive.
Other then that, just remember to use Heavy Destoryers on Light transports or 2+sv troops, your normal Destoryer are better vs anything with AV 12 or more, and you have alot more of them.
The only thing I would think about changing is dropping the Immortals, to get the extar Heavy Destoryer, and 2 more normal Destoryers, or max up your Scarab unit. 9 scarabs with D feilds has a 100% rate of killing tanks (on paper, 36 attacks, 6 Glances, and a glance has a one in 6 chance of killing a tank), but even 4 bases will do alot of damage and has a 1/3 chance of killing tanks. I love scarabs!
Also, remember, if you want a Really good distraction, and the enermy does not have much in the way of 2+ saves (Eldar, IG, Tau, Orks), boosted Heavy destoryers up a flank will make people worry, and with a 3++ sv, they are able to take alot of firepower. Plus, if they live, you have a nice side armour shot on any tanks on the feild (with your 12" move).
Wofen
