The summoning itself is difficult I think there are arguments for Wisdom 3 to 1.
Yeah, that's exactly the same as what my gut feel was (since antinomian spells are Wisdom 3). It's just that there's no actual mention that I can find.
Which Sourcebook that from? Can't say I remember it.
MtAw corebook. Phantasmal Weapon is a Prime 4 spell that makes, well, phantasm weapons (and armour).
MtAw said:
The mage creates a sturdy phantasm, and can even create functional weapons and armor.
As with Prime 3 "Phantasm," p. 227, except the object has a Durability equal to the caster's Prime dots. Successes can be allocated to create an equipment dice modifier or armor points for the object, or even to increase the Size above five points (on a one-for-one basis).
That's the whole description. Note the lack of a limit on how many successes can be dumped into equipment modifier/armour points. For instant casting, of course, it's not really very relevant - you'll be lucky to get more successes than a mundane weapon's modifier let alone a Matter-boosted one, and that's without taking penalties for extending the duration (it's Prolonged). For extended castings, yeah, needs some clarification.
So I personally would allow a player to gain a Banisher Spell iff there is a RP aspect behind it of them trying to develop something over multiple sessions.
A lot of them are fine and even good (Call Eidolon in particular is a spell that should be available), but some of them are just lolworthy like Trojan Horse (imbue Sleeper with Thunderbolt, next person who casts anything near said Sleeper gets zapped, "The spell released in this way from a Sleeper requires no roll to hit. Damage caused by the spell is equal to the caster's Gnosis + 3"), Confuse Language (removes target's ability to use language, but is resisted instead of contested and has full effect on one success), Pierce Magical Shield (Prolonged self-buff that gives "I ignore all Shielding"; this makes the arms race break decisively in favour of rocket tag), and Desiccate (transfers dots of Physical Attributes and Health from a target to you, stacks with itself, no duration listed).
- There is also a Fate spell that protects against all supernatural abilities trying to alter ones Fate, which includes making someone do something against there will like mind control. So that should also work besides Mind and Prime,
It's not a spell, it's the ability Unfettered at Fate 4 that lets you reflexively counterspell. But yes, I hadn't noticed that it worked on mind control. There is also True Love, which is Fate 5 and amounts to "no mind control if the lovers are together" (because their dice pools to resist are added together, and you're not beating that). Neither works on Psychic Assault/Sword, though.
not sure here but don't you also need a sympathic link to the location
You do.
The issues with the Somebody Set Up Us The Bomb plan, from my POV, are these:
1) It's available too soon; sympathy murder otherwise requires four dots in an Arcanum (and even then it has to be Mind or Prime, since there are no other non-aimed non-touch attack spells at three dots; Life and Death need five and in Death's case that's Devouring the Slain which has some serious asterisks).
2) While you do get the penalty for sympathy, the reason sympathy murder usually fails (even without Wards) is because that penalty's stacked on top of a bunch of others (no-name penalty, resistance, Occultation, Magic Shield), and all four of those trigger off being directly affected which teleporting grenades doesn't do (okay, the no-name penalty applies to the scrying, but once you've gotten that through the Apportation ignores it). And you only need one or two successes per bomb despite bombs doing a lot more than two damage each (they do Force automatic levels + Force dice, and there are Size 2 explosives with Force 5+).
Ward
does work, though, which is why I said you kind of need Space to block it.
-I'm pretty sure "Ban" can't be ignored you can only get around with magic which will cause a clash.
I mean, that's one way of looking at it (the other way is that it adds extra stuff blocked to a Ward, which can be overcome with X successes), although that gets even sillier in terms of "you need Space/Prime to pass" hardstop. (The ultimate example is probably the "Ban one dude from one side of a motorway" trick where he gets squished against the Ban by his car's momentum, but there are a ton of other applications e.g. "Ban someone from an area that encircles him and now he's stuck with no ability to resist".) It is probably Life 4 to Ban people, though (not actually spelled out for some reason), so that's something.
That said you make it sound like other Mages can't learn Space or Mind Magic you can be Ancanthus and still have high Mind and Space stats
Sure, but if X and Y arcana are better than others, then the Path that pays less for them is advantaged (Mastigos also don't pay 1 Mana for using Psychic Assault/Sword without the rote, and their spammability due to being Covert is the whole issue).