I'm playing two characters plus Imoen and escape to Akatla took me about 36-40 days!!! (I have no clerics in my group
).When faced to Illych I felt "morale failure-running" (me, not my characters)... it's a MADNESS! And when I saw the fallen deva (I have read the read-me of tactics, but all the way I felt surprised!) I thought that it was too tough. Too hard.
And then I find a cheese (mark to see, it is a spoiler to Tactics
.Imoen must escape to Akatla, so she CAN'T die. First time, when she reached 1 hit point, she said she went away... but second time she stood and took hits without die nor have below 1 HP (I had change her script to "none", but I think that with previous script it worked too). So I used this cheese to defeat illych & CO. (sorry, I know it's cheese... but it was so, so tough...). I used Imoen as a furniture to close the upper entrance to the sewer of the Otylugh, and she catch all the fire. When the fallen deva was summoned, it conjured its fire storm and hit all the bad guys including the demon. Is was unsummoned -time-, and a new one appeared. It conjured a new fire storm, and leaved all the bad guys at one step to death... so I appeared and finished them. Imoen was at 1HP and cried "ah, ah"... but didn't die... total cheese.
Tactics is cool... and I think it BURNS, too!
But I want a challenge because now I'm replaying the SoA again I was finding it too easy... ohoh... I hate duergars, hahahha. Well... that's the cheese. To the group that scripted Tactics... "you're cool!"
The dialog with illych is good, hehe, you improved not only the battles and that's good 
