List of affected spells:

• Frozen Armor / Shiver Armor / Chilling Armor
• Enchant
• Energy Shield
• Thunder Storm
• Blizzard
• Frozen Orb
• Meteor
• Hydra
• Blaze
• Fire Wall
• Chain Lightning
• Charged Bolt
• Teleport
• Fire Bolt
• Fire Ball
• Ice Bolt
• Ice Blast
• Glacial Spike
• Nova
• Frost Nova
• Lightning
  

Every spell here can be Activated/Deactivated so pick and mix as you want. All duration are in Frames, 25 frame = 1 second.

Frozen Armor, Shiver Armor, Chilling Armor, Enchant, Thunder Storm received a multiplier (which can be modified) to their duration (by default 2x)

Thunder Storm range and attack delay can be modified
Range increased from 11.3 yard to 20 yard
Attack speed modified to fixed 2 seconds (50 frames) from changing 4-12 sec.

Blizzard area of effect and missile spawn rate can be modified
Area of effect from 7 to 10 (increasing it too much will make blind spots, reducing it to 1 makes all blizzard projectiles fall into the same spot)
Missile spawn rate from 4 to 3, making it faster (so it covers the larger area about the same)

Teleport received two switches

• Teleport can be used in towns
• Teleport costs 0 mana and it's maximum skill level is reduced to 1 (since it's free anyway there is no need for more points)
  

Spells modified in version 2.0:

Chilling Armor missiles' speed and duration can be modified
Missile speed unchanged (18)
Missile duration unchanged (25)

Chain Lightning jump range, number of jumps baseline, Jump Power per level and Jump Power needed per Jump can be modified (about Jump Power read below). Added missile speed and missile duration options.
Missile speed unchanged (30)
Missile duration unchanged (25)
Jump range reduced from 20 to 15 (so it doesn't fly off screen that often targeting a far away enemy)
Number of jumps baseline decreased from 5 to 4
Number of Jump Power per Skill Level increased from 1 to 3
Number of Jump Power needed for +1 jump unchanged (5)
*Note: with these changes a Level 1 Chain Lightning does 4 jumps. At level 2 it's Jump Power is 6 so it gets +1 Jump since 5 Jump Power is reached. At level 3 it's Jump Power is 9 so no Jump increase. Etc...
Here is a picture to demonstrate how it affects it from Level 1 to 20:


Charged Bolt number of it's bolts (missiles) can be modified both baseline and per level. Added missile speed and missile duration options.
Baseline is unchanged (3)
Missile speed unchanged (12)
Missile duration unchanged (98)
Per level bolt missiles is increased from 1 to 2
*Note: for some reason the hard limit is 24 bolt missiles. I didn't find anything that could change it.

Meteor explosion radius and burning effect duration can be modified
Missile duration until impact unchanged (60)
Missile visual fall speed unchanged (25)
Explosion radius baseline was unchanged (6) 
Explosion radius per level was increased from 0 to 1 (you will see 0.65 yard increase in game per level because of some funky math)
Burning ground duration baseline increased from 1.2 sec to 3 sec.
Burning ground duration per level increased from 0.6 sec to 1 sec.

Hydra duration and maximum limit can be modified
Missile speed unchanged (16)
Missile duration unchanged (30)
Maximum number of Hydras increased from 6 to 100
Duration baseline unchanged (10 sec)
Duration per level increased from 0 sec to 1 sec

Blaze movement speed and duration can be modified
Ground fire duration baseline increased from 90 to 100
Ground fire duration per Level unchanged (25)
Baseline movement speed increased from 2% to 10%
Per level movement speed increased from 2% to 3%
Blaze duration effectively doubled*.
*Note: Blaze uses a minimum to maximum duration from skill level 1 to 99 with diminishing returns. Meaning that by skill level 20 you will reach 84% of the maximum duration. Also the fire trail duration is (by my knowledge) not changeable.

New spells added in version 2.0:

Fire Wall range baseline, range per level, spread speed, duration baseline and per level can be modified.
Range baseline is unchanged (7)
Range per level is unchanged (2)
Spread speed is unchanged (12)
Duration baseline is unchanged (250)
Duration per level increased from 0 to 25

Frozen Orb added options to modify various parts of the orb, the missiles coming from the orb and the missiles created if the orb hits an enemy or when expires.
On hit and end of duration missile density decreased from 4 to 3 (for reasons less is more, set it to 1 for the most amount of missiles)
Orb speed reduced from 10 to 7
Orb duration baseline increased from 30 to 50
Orb duration per level increased from 0 to 5 (you get +1 second duration for every 5 points)
Secondary missiles speed unchanged (18)
Secondary missiles duration baseline is unchanged (25)
Secondary missiles duration per level is increased from 0 to 5 (you get +1 second duration for every 5 points)
Orb on hit missiles speed in unchanged (24)
Orb on hit missiles duration baseline is unchanged (25)
Orb on hit missiles duration  per level is increased from 0 to 5  (you get +1 second duration for every 5 points)

Telekinesis range and knockback/stun chance can be modified
Range is increased from 25 to 50 (now you are no longer out of range for that WP or chest)
Chance to knockback/stun increased from 35% to 50%

For the following spells, only speed and duration can be modified and are all unchanged:
Fire Bolt, Fire Ball, Ice Bolt, Ice Blast, Glacial Spike, Frost Nova, Nova, Lightning

Damage numbers are not modified.