Hey, MidgetMarine here. First off, this is a great idea, nice job Cerubois! I like how accessible fan-written stories are thanks to this thread. Having said that I'd like to just add a few things.
1) You are correct in assuming that High Tide does involve some rather pivotal original characters. HOWEVER, champions are the main characters. The Vincent who i guess you thought was a main character, is gangplank in his younger years. So putting it under Gangplank's name would be useful for those looking for a GP story. all of the champions in High Tide, some of which have yet to appear are: Gangplank, Miss Fortune, Brand, Fizz, Nautilus, Heimerdinger, Caitlyn, and Potentially: Veigar, Yi, Wukong, Irelia
2) As for a little synopsis of High Tide, here you go: Vincent II, son of the famous pirate Vincent the shadow, is thrust into the adventure of the lifetime when his father's ship disappears in the deep northern ocean. Accompanied by Sarah Fortune, a girl he barely knows, and a rag-tag crew of sailors, Vincent begins a treacherous journey across the sea that will turn the young man into the cold-hearted, globally feared pirate we know as Gangplank.
3) My first piece of work, A Twist of fate which is, as far as i can tell, the longest LoL fanfic yet. (30000 words, 97 pages, 16 chapters) can be found at this link http://na.leagueoflegends.com/board/...=twist+of+fate
4) The champions featured in A Twist Of Fate are: Nasus, Renekton, LeBlanc, Lux, Garen, Xin Zhao, Swain, Katarina, Jarvan IV, Poppy, Galio, Sona, Twitch and Twisted Fate
5) and finally, here is a synopsis for A Twist of Fate: When the antics of an underground gambler known as the Card Master and an ancient beast that accompanies him become a threat to the Demacian government, the prince of Demacia and two powerful warriors pursue the two criminals to the rival city of Noxus, where, unbeknownst to them, an assassination attempt upon the prince's life is being plotted.