Notes & Combos
I never summoned Ultima Witch nor Cats.
To be honest you don't need to buy the new box, Ultima Witch is situational and Straynge Witch is a great addition but not necessary. The structure deck is enough.
My top fusions (by usage) are:
1)Charmy Witch
2)Sevens Paladin
3)Master
Charmy Witch makes SR Witch on field usefull, if your oponent sets 3 monsters it can change 1 to attack so SR Magician can attack it and Charmy attacks a set one. Its great agains Galaxy since most of their monsters have low def.
Paladin and Master are too expensive for what they do, i summon them for the win, but if my oponent will survive the attack, Charmy Witch + Magician can inflict more damage.
In my experience, most of the time the one to inflict damage first wins.