I have no custom chain skills.
Its best to experience the SM... different situation need another skill.
But as a tip:
Use Infernal Blight (goldstigma from solo tree) if its up. It lowers the stats from the target (normally pvp one or boss)
After that start with something like erosion + other dots. Hold your Weaken Spirit + Elemental Smash on cd and use between sometimes vakuum Choke + the follow skill.
If your mana gets low or you need HP: Use Backdraft. (Or if you know, in ~3sec will be dmg, start you cast + the HP needs time "to fly to you")
And.... thats special.... if you get the daevanion skills everything changes :'D but till then you will know your class better and maybe know without help what you can do