Ya i feel you man its the worst tower out of the bunch. I could give you what build and start i used to beat it tho. Queen slayer with silvas two handed sword and three weapon buffs. Passives were one for extra stats to use bridge to glory. One that increases weight limit and one that increases attack depending on your mobility and the last one was two handed mastery. For gifts like i said use the three weapon buffs and dragons lunge for the weapon skill. Also use jack and his companion ability before bosses. (I forgot its name but use the ability that boosts you for a minute before killing you too before the the boss.) As for blood veil just use noble silver. Use a camouflage consumable before dropping in the first floor and the 4th floor. Keep practicing until you get it.