Tactical advice for Tarnor in the Sewers Options

[sturmvogel]

Having struggled mightily with Mencar Pebblecrusher's party (none of Keldorn's 3 Dispel Magics dropped Sorcerous Amon's protections (thank ghod for Emotion!)) I'm a bit concerned about trying to deal with Tarnor's crowd, which has always been more of a struggle for me in the regular game since I've never been a very tactically elegant player.
I gather than my normal tactic of invisibly sneaking up and letting off a double cloudkill has been deprecated by Sikret and would like some advice for my 1.2 million XP party consisting of:

Me R/C
Keldorn
Jahiera
Yoshio
Xan F/M
Kelsey

[thetruth]

@sturmvogel

About the sewers party, at 1.2 XP it's a difficult fight.

You can use a (hasted) character with Ch.Commands as a decoy, keeping the others back and trying to divide the enemies.
IIRC few of them have MR, but they drink potions at the beginning (potions of Magic Shielding included= automatic s.throws). So you could open the battle with Keldorn (buffs + T.Sight) who could cast a Dispel Magic at their direction. It should dispel their protections but not Gaius who has SI: Abj..

Immediately after the Dispel Magic, cast 1 G.Malison with Kelsey and summon some monsters (better from the Wand of Monster Summoning). The summons should distract Gaius and the others. When he casts D.Spell repeat.

In the meantime and from safe distance, you could cast with Kelsey some Feeblemind spells + Doom from Jaheira at their fighters who should have already the penalty from G.Malison. Some of them will fail the s.throw sooner or later (a feebleminded enemy = a dead enemy).

Also it is better to attack with all of your characters one enemy at a time.

Gaius is the hardest one because of his protections, but if you kill the others things become easier.