Tzeench psychic powers

One of the things that keeps cropping up in my group is how under powered chaos are.  In particular, how under powered Tzeench magic is.  The so called god of magic has one of the weakest spell lores out there.

I have attempted to remedy this with my own list.  See what you think.

Flickering fire of Tzeench.  WC 1+   Primaris Power
This is a witch fire with a range of 24 inches.  Declare how many warp charge points you want to attempt to cast this at.  This spell does a number of d6 s4 ap5 hits equal to the amount of warp charge declared.  Eg a WC3 cast would shoot 3d6 shots.  Any unit taking at least one unsaved wound will be affected by soul blaze.

Blessing of Tzeench WC 1   Spell number 1
Malediction.  On a successful cast of this spell transfer d3 warp charge points from your opponent’s pool to your own.

Bolt of Change WC 1 Spell number 2
This is a beam with a range of 24 inches.  Any target lying under the beam takes a strength 8 ap2 hit.

Future sight.  WC 1 Spell number 3
This is a Blessing affecting the caster and his unit.  The unit gains d3 rerolls which last through this turn, and the opponents next turn.  These may be used to reroll any single dice for to hit, to wound or save, or cast or deny spells.

Breath of Chaos. WC 2 Spell number 4
This is a witch fire.  This has a range of template.  Any model hit by this template must take a toughness test or take a wound with no armour or cover saves allowed.  Invulnerable saves may be taken, but successful saves must be rerolled.  Any unit taking at least one unsaved wound will be affected by soul blaze.

Transformation of Tzeench WC 3 Spell number 5
This is a witch fire with a range of 24 inches.  The target unit takes 2d6 s6 ap 4 hits.  If at least one model is removed as a casualty you may add a chaos spawn model to the table, one inch from the target unit.  It has a number of wounds equal to the amount of wounds inflicted by the spell.

Firestorm of Tzeench WC 4 Spell number 6
This is a witch fire.  Center the apocalyptic blast over the sorcerer casting this spell.  Every unit covered by the template take a number of hits equal to the amount of models under the template.  These hits are resolved at s5 ap4 with ignores cover.  Models with the mark of Tzeench, or Daemons of Tzeench are immune to this power, but models with the Mark of Nurgle or Daemons of Nurgle take two hits. Any units taking at least one unsaved wound will be affected by soul blaze.