Like joliekiller said, It would also be nice to use the principle of 1+1=3
for example: If your char and the DK uses the lightning spell at the same enemy at the same time, that the the lightnings come togetter to form a more powerfull lightning to the enemey that is more powerfull than the two lightnings split appart. or some thing like that <img src="/ubbthreads/images/graemlins/think.gif" alt="" />
And may be an offencive spell that only works with two(think dual attack,...)
Well you get the idea <img src="/ubbthreads/images/graemlins/idea.gif" alt="" />. any help to formulate this suggestion welcome