IPT scales slightly badly, but before you go into rage mode like I did upon finding out its not so bad....
To put it into perspective on levels...
1 Physics, Economics etc.
2 Geography, Legal Studies
3 IPT, Engineering Studies, PDHPE
4 Food Tech, Community and Family, Senior Science.
(heh, I did paraphrase this from UAC, i didn't just pull it out of my ass)
Besides, its very easy to get high marks in IPT. Anybody who is either smart or puts a fairly decent amount of work in can get a band 5 easily. Band 6 is a little harder to get, you have to cover EVERYTHING in your answers, analysis of systems etc. but its do-able.