The questions asked in AIEEE are not that tough but what matters is the speed on that day which can be increased by practice and solving some mock tests.
Maths : Preferably practice coordinate geometry and calculus and after completion go for sequences,complex and vectors.
Physics : Practice electricity and magnetism, mechanics , modern physics in order. Even if u r left with some time go for optics, thermodynamics and waves in order.
Chemistry : Practice whole physical part, revise concepts of organic and inorganic every morning and practice them.