first of all, Meikyo Shisui meaning
Meikyo : Meiyo(Kanji) : Honor(english)
Shisui : seisui (Romaji) : Pure(english)
so Meikyo Shisui means a Pure Honor
Yep, that is one of the stronger 2 hours, using it gives you a great hate from the mob only if you hit, cause you know, samurai's ws miss several time. you can solo a 2 skill chain in a row and if you use Meditate while 2 hours, 3 SC possibly. Soboro(GK lvl 50) help you alot for building tp, having haste gear isnt a waste of money, like +10% haste gives you a 2 secondes shorter, Haste itself gives a +15%.
i use /drg for jumps abilities(like a direct hit who gives you the same amount of tp than a normal hit) and soloing Fusion with Gekko(silence effect) and Kasha(paralyse effect). Fusion in party gives you a great amount of hate, so be sure to have seigan + third eye ready to use
i still looking forward to solo Light without 2 hours, so, 2 light SC in a row is possible.