[QUOTE=Graden]
3. I really want viconia because of the romance make the game extra fun

What should i do so the first romance dialogue will appear ? Many thx!!![/QUOTE]
Everyone's pretty much giving great advice already, so there's not much i need to say.
This is what i would suggest as your party composition:
1. Korgan (tanker)
2. PC, fighter/thief (support-fighter)
3. Edwin (mage)
4. Viconia (cleric)
Being a powergamer myself, i usually go with the most powerful people.
That said, Edwin's place in the party should be self-explanatory. In evil parties, Korgan is almost always my core tanker. Pure-clerics suck in my opinion, but Viconia does give the best romance. (I have a thing for ****y chicks.

) Nonetheless, she's still the best cleric game with that max wisdom and 19 dexterity.
That leaves the last slot for your PC and I gave ya a fighter/thief. They're fairly decent fighters, but not great tankers since they cant absorb as many hits as regular fighters, so hence, the "support fighter". Their strength, of course, lies with their backstabs. First-striking with a backstab at the start of every battle should help you win most of the time. The fighter part increases your Thac0 quite a bit, which gives your backstabs a higher success rate. With the thief, you also can deal with most locks/traps much easier.
ToB installed
As an alternative, you can also try a multi-thief/mage. You still get your thief to deal with locks/traps, but as a mage, you also get Project Image/Simulacrum. Basically, it's PC twin of Jan, except for the stats difference (and the turnip gibberish).
