This month's issue of Arcadia has an MBAA tier list made by top Shiki player はと(Hato), here is Versus City's (very bad) translation of it
http://www.versuscity.net/2009/06/30/arcadia-august-tier-list-trouble/..Yeah, you'll notice Akiha is in 3 places and Kohaku in 2 places on that list, not to mention Shiki and Hisui being completely absent. Luckily, I have the text from the original page, so here a better translation
アルカランク
神 吸血シオンH
S メカヒスイC
A ネロFH、志HC、琥珀CH、都古CF、七夜C、ヒスコハCF
B 青子FH、悪アルクC、赤秋葉F、翡翠H、白レンF、さつきC、シオンC、アルクF
C シエルC、キシマF、リーズF、ワラキアC、秋葉CH、ロアHF、レンH、猫C
God: H-VSion
S: C-Mech Hisui
A: F/H-Nero, H/C-Shiki, C/H-Kohaku, C/F-Miyako, C-Nanaya, C/F-Maids
B: F/H-Aoko, C-Warc, F-VAkiha, H-Hisui, F-WLen, C-Satsuki, C-Sion, F-Arc
C: C-Ciel, F-Kouma, F-Ries, C-Wara, C/H-Akiha, H/F-Roa, H-Len, C-Neco