Hi, grats on level 20!
Since you're VIP the first TR isn't gonna be that bad... You only need 3.1 million xp wich isn't all that bad. However I'd advice you to level another character to about 10 and do the first 4 quests in necropolis I, the first 3 quests in delera's and the first 4 quests in necropolis II.
That way you'll be able to open and farm 3 of the best xp quests at low level and should be able to breeze through.
Secondly if you decide on doing a clonk you will most likely want to find a non-weapon devotion item since ardor clickies are no longer the way to go... if you know anyone who's been leveling cannith crafting you can put devotion on a ring, thus freeing up your weapon slot for dps wraps. At low level you could use the wraps from delera's for devotion:
http://ddowiki.com/page/Devotion_%28handwraps%29
About the pure vs splashed cleric... I see no point in going pure cleric since the capstone is situational at best where as evasion and +2 wis isn't... same goes for 2 free fighter feats... or a free metamagic + force enhancements for blade barrier from splashing wizard. However keep in mind that most groups are inviting you to heal so make sure you put those AP into the healing lines and atleast try to prevent people from dying.
... Also for the love of god DO NOT put stuff like "I do not heal stupid" in your bio... it makes you look like an ass.
Oh yeah one last thing. Make sure you get a greensteel accessory before TR'ing, they're still the best items in the game for TR's since they have a minimum level of 11 - I'd advice you to get a pair of concordant opposition goggles with either SP or HP.