So, here's my story. I want to create a "Shadow Walker", or assassin-type rogue with wizard levels, so as to be able to better weaken and wound his foes. He's an illusionist assassin, and I want advice before diving in without experience. If i have 4 levels to work with, how should I split it? 1/3*, 2/2*, or 3/1*? And after that, what levels should i choose from there on? I would like to focus on rogue levels, with, at level 20, at least 5 wizard levels. What should I invest points in when doing the stats? Please answer my questions as you are able, thank you.
(Yes, i realize i used alot of colors, but that's to keep people from getting bored reading a big box of plain text.)