much less fun if you are undead yourself... even lvl 110+ are killed pretty easy with low lvl banishment (i refer to other topics on this forum)
There is more. If you have a bad day, you can meet a dark elf with a lvl 50 icestorm... though a lvl 25 char should have absolutely no problems with a dark elf - even a lvl 15 shouldnt i suppose - the player will be frozen in seconds - or less.
Several suggestions are made to tackle these problem (make banishment less deadly, create a new item that gives a good banishment protection and so on)
I would add one (or two, depends on the problem you face)
the banishing problem: make undead less vunerable for banishment attacks. a resist holy word -50 is still a huge draw back, but its better to compensate with the items suggested
a more general solution for that rod-business.
Rods are overpowered compared to the spell cast (at least banishment is)
i would suggest: leave the rods as they are (lvl and so) but divide the damage dealt by a rod with some factor, 2 or 3 would be reasonable. or, to add some dynamic... divide by (round((sqrt(lvl)) /8) +1)
that way a lvl 4 rod wont be changed at all, while a lvl 110 rod ecomes what now is a lvl 47.598 rod

maybe this formula should get a little more compex, to compy to crossfire formula standards

new lvl = int( (old lvl)^.75 + 2*(old lvl)^0.5 - 0.5)
with this formula arises the problem that low lvl rods (till around 14 i suppose) actually become more powerfull!
let me know...
by the way... i suggest this because i dont think it is wise to affect the damage dealt by a spell, though i think that rods in general, and banishment most of them, are to powerfull
EDIT:
The main target of this post/topic is NOT the banishment problem - there are many other topics about that, but the 'almighty newb with a lvl 110 rod' problem, no matter what rod he has

For i edited the post after receiving some comments online, this note might be obsolete

edit: changed title