Whoa thanks a lot! Didn't expect this elaborate reply.
Next time I will try the zombie dragon strategy of deep striking next to the summoned ghouls and the summoned courtier from behind or another edge, this would confuse the opponent a bit while I advance with the rest of the army (considering they are still alive). For the front I tend to use ghouls only in units of 10 to screen and grab objectives so they mainly die quite fast.
1- As for the most common gunlines I have been facing, I have faced Skaven and cities of Sigmar. Both of them based around lots of dice which hurt me the most. Skaven was the worst, as they had the extra mobility from their tunnels.
2- The strategies used by both has been to have a huge blob of units all together, infantry first and all the shooters behind. Shoots, kills 1 unit and advances slowly with the army to move up the blob and eventually takes objectives. The best thing I have done so far I think its to cast the barricade nearby him so they can't move fast enough, delaying the objective grabbing. At the beginning of the battle I always manage to grab objectives and hold them, but by the end my oponent has always tabled me.