Wishlist: How to defeat a SC or Thug?

[bgifu]

I always play with my friend.He was used to play LA Agartha and I like to play LA TienChi.
He know only one strategy-- Use a SC pretender and research construct.
In early game,he expand with his immortal pretender and initial high dominion.I could expand faster than him and beaten him in most fight.However, his immortal pretender could defend my attack in his dominion.When his construct arrived 6 or higher,my nightmare was coming. With high magic resitance and high regenerates(even more 31hp per turn), I can't do nothing with his SC even the mind burn,paralyze,soul slay spells.
Although he can't defeat me on the moment.When his construct arrvied level8,the game is over.
I realy realy felt helpless.I realy realy need someone help me.How to defeat the SC strategy?