i tested the magical archetype a while back and was very surprised that it was quite good. It even somewhat reminded me of agents in that Junon could pop cards the same way Hyperion does. i based my deck on using the spell books to get more spell books and to be able to stock the grave to get Junon out. I also have a very good way to get 2 Junons in one turn which works quite consistently. To do this all i need is one random spell book, the grimoire spell book, and temper the magical summoner to be in your hand. you simply summon temper, activate grimoire, bring necronmicon to you hand, use tempers effect to get 1 Junon, activate necronmicon to special summon temper and get another Junon. After that you can pop two cards by banishing the two books in your grave.
My core strategy
Stock the grave with spell cards and then get temper so that i can special summon Junon, XYZ into cards which can easily control the field like zenmaines, keeper of Armageddon, and black corn. Use spells to control the field.
Key cards and support cards
grimoire spellbook
hygromanteia spellbook
necronmicon spellbook
Junon the magical priestess
temper the magical summoner
Junon is of course the boss monster of the deck, but the other 4 are key cards because they are my main engine in summoning her. i do not summon Junon by tributing(tributing wastes a normal summon=bad idea) but by using temper's effect to special her. I can also use necronmicon to get temper back and get 2 Junon. When i do this, i usually pop 2, attack with both, and if i still have a spellbook or two in my grave I overlay them into my own personal MST: Hieron the magical Hierophant.
I put key cards and support cards together because the purpose of this deck is accomplished by using the 4 support cards to get the main card out.
Consistency
like i mentioned before, this deck is very much similar to agents. Being so similar, magicals are equally consistent to the agent deck before earth got hit down to one. They are very consistent because they have 2 main search cards: the grimoire spellbook and Batel of the spellbooks. The first search card is a spell which if not for it's second effect would have been so easy to abuse but even with that effect is still quite good. It searches other spellbooks hence thinning your deck and giving the deck much more versatility. The second is not as good because to use it you have to waste a normal summon, but Batel is good in tat you can normal summon him to bring grimoire to your hand and use grimoire to get another spellbook. this way, spellbooks get stocked in the grave for when you get Junon
Draw engine
My only real draw card in this deck would really be wonder wand because anything else would be excessive. It is like running a draw engine in a gadget oppression deck: with all of the searching already going on there is no real point to doing so.
tech cards
summoner monk-works well to get a level 4 XYZ becaus about 17 cards are spells and also stocks grave with popping stuff for Junon
Tour guide-a free rank 3 in never a bad thing
sangan- tour guide's boyfriend...
magical dimension- like my own personal Gemini spark which lets me get out Junon
future for this archetype-right now it is an OK archetype which i would put at tier 2 level but i believe that later on there will be more support for this archetype and the archetype will become tier 1 because it already has a lot of potential.