I do not play Sorcerers. I even deleted my first one after hitting 16 in the Underdark. Just too boring for me due to the immense repetition and lack of flexibility.
Furthermore I use a SCSII component which turns almost all +1 weapons into fine ones. Therefore a lot more are subjeced to PFnW.
True enough Heal has it's uses, but more due to the fact it heals almost all negative status effects like blindness, diseases, etc.
I also got a mod which (re)introduces Dimension Door and Teleort (level 7 spell). Both are barely justifyable for a Sorcerer but can be easily picked up by a mage. Of course Teleport mainly saves time but it's fun from a roleplaying point of view.
Oh and another nice modification by SCSII is to make individiual Spell Immunities available. Therefore I can get Imp Invis coupled with SI: Divination and maybe Stoneskin/PfmW/Spellshield into a Trigger, for example something which is impossible for a Sorc. Unless you want to sacrifice something for a seperate Spell Immunity which I doubt anyone would do.
Overall Mages are much better with some modifications like true PnP spell progression which gives them 7 slots per spell level up to level 9 spells.
Bioware really gutted wizards in favour of Sorcerers in the original game. Shameful.
Edit: I noticed in your fight with the demi lich you opt to protect yourself from MMM with PfmW. Why not MGoI? Stops them just the same.
By the way great music choice in your videos!