No you can have high tier abilities and low tier abilities and still be intermediate if the majority of you skills and powers are intermediate.

[quote]Skills, powers and abilities: [b]List and justify your powers in this section, and list their Level. Detail, justification, creativity and attention to detail are all paramount.[/b] If you simply write out 'I have Big Bang attack!!!' then we shall not accept it. There is no limit to the number of abilities you may possess, however you should stick to the general theme of your character, and Judges will review the unity of powers. [/quote]