Well, i think you meant "macro".
Since you played your character you know what skills you want in a macro.
For casters a lil bit more hard if they use anything what's speed up the cast time then macro will fail.
So, if you want to make one, you must test out how much delays you need between 2 skill.
for example! (never made macro for my sm, so an assasin one)
/skill Ambush
/delay 2
/skill Suprise Attack III
/delay 2
You can calculate out the delays you have to use between 2 skill and after some usage they will work as you liked. Keep in mind, in pvp there is so much fail factor, for example when the target goes out from your range and etc. good luck!