Too much reading...
You should be building your own deck anyways. Just play a little Fight Club or Daily Tourney and look at the half decks you run into.
Here's some rules I follow -
1. first take out everything with less than 6 power.
(Unless you are using All Stars and it's Randy or it's a Damage reducer.)
Cards taken out - sell on market or to Kate and use the clintz to buy other things.
2. Next pick your favorite card to use.
3. Build around card.
Btw Sentinel deck isn't that bad... Just buy Carmen, Zrobbie, Irene, Morgan and John to replace Carlos, Miranda, Earl and Lehane.
Nightmare, you sorta should have the staple Oshitsune.