So this would be the best thing ever but im not how practical it would be... You buy a chest/bag combo, you put the chest in your home and take the bag with you. Whatever you put in the bag is sent to the chest. So its like a Bag of Holding almost. If you die and lose the bag you'd need to find/buy a new one but you wont lose anything in the chest. 

It would also let you take things out of the chest from the bag, so would be a convenient way to store potions and reagents. The bag would only show the contents of your own chest so if you steal a bag it would be empty unless you have your own chest/house.

This could almost eliminate a lot of walking back and forth to store stuff.

Could also come in Mundane magic form, a spell that teleports an item from the ground to the chest (has to be located in your home)

 

And while yes, this could cause players to stuff their belongings in the bag to avoid losing them when pked, they'll still lose the bag which is valuable on its own.

Another spell ! Or skill, who knows.

1. Empower, this is for Evil. It could be a skill or Necromancy spell. Empower is like bless, + stats (and weapon skills), except only str/stamina for a drastic hp/accuracy/damage boost, while reducing your maximum SP/MP. It might be better as a skill, that Wizards would get 200 of, that way a Dark Wizard could greatly 'empower' his HP/melee damage/accuracy/attack speed at the cost of 50-60% of his maximum SP/MP, essentially toggling on a 'battlemage' form (this alone would solve a LOT of his current woes) Evil Rangers and Merchants could also recieve 100 of this.

2. Sanctuary ! A holy skill, that when toggled will drain SP rapidly but prevent Evil monsters from harming you (has a cooldown so cant be spammed) Allowing you safe passage from Evil.

Evil PLAYERS could still attack you, but doing so will cause them to lose HP/SP with every hit. Cannot attack while in sanctuary.

New skill suggestion !  This one is for Good and Evil rangers but could go to Rogues as well (i feel right now both rogues have a 'defensive' ability, one is absorb and one is lifetap.)

For Good Rangers/Rogues you have Focus, toggle this on and your attacks gain 100% accuracy and cannot miss, costs SP per attack similar to Adrenalin. 

For Evil Rangers/Rogues you have Alacrity, reduces your attack speed to 1 second, also costs SP per attack.

Different styles for different classes, i feel that ranger especially kind of needs their own toggle ability since they have limited absorb/adrenalin/lifetap/

Next, you talked about the possability of REQUIRING a wand/staff for spells which could really hurt all classes, so this skill could be very useful, call it Channel, having this skill lets you cast spells using any weapon in your hand, nullifying the penalty at the cost of one of your 12 skills. 

 

Eventually there will be enough interesting and useful skills for every class that people will begin making cuts to crucial things. My barbarian already gave up Druidry a long time ago, i even often turn off Dual Wielding or Archery or Poison, just to make room. Achievements/Titles to get extra Skills would be great :P