The thing about playing a dexxer is that you're right in the heat of battle.
A slight majority of your time will be spent fighting Dark Fathers. In addition to doing serious damage, they summon other spawn, including lich lords, rotting corpses, reverents, etc. The reason I suggest more parry - and possibly bush - is that is gives you a higher chance of survival. Now, if you die (which you will, lol), there are usually helpful players around to rez you.
In doom, arties drop based on the amount of damage you do. Dexxers can potentially do a lot of damage. In fact, the sampire is a favorite doom template. My doom arty miner is an archer. Tamers are extremely helpful, as are disco bards. Tamers can tank, disco bards...well, disco. However, these templates won't necessarily deal as much damage as a dexxer or an archer, so I don't recommend them. It's possible to do damage (I know all the doom bards/tamers are going to mug me, lol), but the drops may come more slowly (which is a shame, as these templates are so darn helpful for the rest of us).
If you like playing your dexxer, stick with him. Give doom a try. It's really ot as bad as you might have heard. If you die a lot or its taking more than 4 or 5 runs around the gauntlet to get drops, try making some adjustments.