I've been playing a Tukaw build that's currently (2pal/2mo/10sor). I've only recently been using firewall, and I love it! However, there are many times when firewall can't be used, generally when the enemy is immune. Other times the enemies are just too spread out, such as when fighting archer type enemies or casters.
I could throw a firewall on each individual, but they tend to move out of the way as well. For the immune enemies I switch to melee and start swinging, but on some quests you fight things like Blackbone skeletons, which have high AC, lots of HP, and are immune to fire.
What I'd like from the forums are some suggestions and strategies as to how to better handle encounters like these. And for pure sorcs and wiz without strong melee, how do you deal with this type of enemy?