Okay I see you are new to wizards and I'll help you a bit
1.Wizards can't go from 0-20 0gapping and having all bard skiils YOU want and all wizy skills you won't have enough sp I recommand you to 3-4 gap all the time and use a calculator
2wizards is one of the builds that need lots of sp even if you teke only wizard
okay hope i could help you ^^
RaVEN spikyness