I am preparing for Maths RMO Olympiad and need some guidance on thoretical and problem solving aspects in the areas of advanced geometry, inequalities and number theory (advanced level of all these). How can Askiitians help me ?

@ r das 
askiitian have eveyrthing to help u . u can join its live classes and they have faculty from top notch colleges and they will guide u towards the rmo olympiad sucess . 

and also they have previous year record break sucess ratio. 
and also u can take self study package of this chapter , that will help u to understand the besic as well as tricks of that chaptrer to solve the problem more efficiently . 
u can also try out thses chapterwise thing at a very minimal cost . 
and they have evrything like video lecture , mindmap , strategy , revision notes . olympiad ques etc . 
u can also get prev year as well as practice ques from askiitian .. 
ALL THE BEST ..