Since you like casters and you want to splash Rogue, but from what I understand, you also want to be able to heal yourself if needed, I'd say a Warforged 18 Wizard/2 Rogue.
Take level 1 as Rogue, 2-7 as Wizard, 8 as Rogue, then 9-20 as Wizard. This will give you enough points (if you max Intelligence and get at least a +2 INT Tome at level 7) to maximize Concentration, Disable Device, Search, Spot, and Use Magic Device, which would be the most important skills for this kind of build.
Something like this, basically.
Code:
Character Plan by DDO Character Planner Version 03.12.02
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Level 20 True Neutral Warforged Male
(2 Rogue \ 18 Wizard)
Hit Points: 184
Spell Points: 1199
BAB: 10\10\15\20
Fortitude: 10
Reflex: 8
Will: 9
Starting Ending Feat/Enhancement
Abilities Base Stats Base Stats Modified Stats
(28 Point) (Level 1) (Level 20) (Level 20)
Strength 8 8 8
Dexterity 8 8 8
Constitution 18 18 18
Intelligence 18 25 25
Wisdom 6 6 6
Charisma 8 8 8
Tomes Used
+2 Tome of Intelligence used at level 7
Starting Ending Feat/Enhancement
Base Skills Base Skills Modified Skills
Skills (Level 1) (Level 20) (Level 20)
Balance 3 3 3
Bluff 3 3 3
Concentration 6 27 27
Diplomacy -1 -1 -1
Disable Device 8 30 30
Haggle 3 3 3
Heal -2 -2 -2
Hide -1 -1 -1
Intimidate -1 -1 -1
Jump 3 3 3
Listen -2 -2 -2
Move Silently 3 3 3
Open Lock 3 3 3
Perform n/a n/a n/a
Repair 4 8 8
Search 8 30 30
Spot 2 16 16
Swim -1 -1 -1
Tumble 3 3 3
Use Magic Device 3 22 22
Level 1 (Rogue)
Skill: Balance (+4)
Skill: Bluff (+4)
Skill: Concentration (+2)
Skill: Disable Device (+4)
Skill: Haggle (+4)
Skill: Jump (+4)
Skill: Move Silently (+4)
Skill: Open Lock (+4)
Skill: Search (+4)
Skill: Spot (+4)
Skill: Tumble (+4)
Skill: Use Magic Device (+4)
Level 2 (Wizard)
Skill: Concentration (+2)
Skill: Disable Device (+1)
Skill: Search (+1)
Spell (1): Repair Light Damage
Level 3 (Wizard)
Skill: Concentration (+2)
Skill: Disable Device (+1)
Skill: Search (+1)
Level 4 (Wizard)
Ability Raise: INT
Skill: Concentration (+1)
Skill: Disable Device (+1)
Skill: Search (+1)
Spell (2): Repair Moderate Damage
Level 5 (Wizard)
Skill: Concentration (+1)
Skill: Disable Device (+1)
Skill: Search (+1)
Skill: Spot (+0.5)
Level 6 (Wizard)
Skill: Concentration (+1)
Skill: Disable Device (+1)
Skill: Search (+1)
Skill: Spot (+0.5)
Spell (3): Repair Serious Damage
Level 7 (Wizard)
Skill: Concentration (+1)
Skill: Disable Device (+1)
Skill: Search (+1)
Skill: Spot (+0.5)
Level 8 (Rogue)
Ability Raise: INT
Skill: Disable Device (+1)
Skill: Search (+1)
Skill: Spot (+5)
Skill: Use Magic Device (+7)
Level 9 (Wizard)
Skill: Concentration (+2)
Skill: Disable Device (+1)
Skill: Search (+1)
Skill: Spot (+0.5)
Skill: Use Magic Device (+0.5)
Spell (4): Repair Critical Damage
Level 10 (Wizard)
Skill: Concentration (+1)
Skill: Disable Device (+1)
Skill: Search (+1)
Skill: Use Magic Device (+1.5)
Level 11 (Wizard)
Skill: Concentration (+1)
Skill: Disable Device (+1)
Skill: Search (+1)
Skill: Spot (+0.5)
Skill: Use Magic Device (+1)
Level 12 (Wizard)
Ability Raise: INT
Skill: Concentration (+1)
Skill: Disable Device (+1)
Skill: Search (+1)
Skill: Spot (+0.5)
Skill: Use Magic Device (+1)
Level 13 (Wizard)
Skill: Concentration (+1)
Skill: Disable Device (+1)
Skill: Search (+1)
Skill: Spot (+0.5)
Skill: Use Magic Device (+1)
Level 14 (Wizard)
Skill: Concentration (+1)
Skill: Disable Device (+1)
Skill: Search (+1)
Skill: Spot (+0.5)
Skill: Use Magic Device (+1)
Level 15 (Wizard)
Skill: Concentration (+1)
Skill: Disable Device (+1)
Skill: Search (+1)
Skill: Spot (+0.5)
Skill: Use Magic Device (+1)
Level 16 (Wizard)
Ability Raise: INT
Skill: Concentration (+1)
Skill: Disable Device (+1)
Skill: Search (+1)
Skill: Spot (+1)
Skill: Use Magic Device (+1)
Level 17 (Wizard)
Skill: Concentration (+1)
Skill: Disable Device (+1)
Skill: Search (+1)
Skill: Spot (+1)
Skill: Use Magic Device (+1)
Level 18 (Wizard)
Skill: Concentration (+1)
Skill: Disable Device (+1)
Skill: Search (+1)
Skill: Spot (+1)
Skill: Use Magic Device (+1)
Level 19 (Wizard)
Skill: Concentration (+1)
Skill: Disable Device (+1)
Skill: Search (+1)
Skill: Spot (+1)
Skill: Use Magic Device (+1)
Level 20 (Wizard)
Ability Raise: INT
Skill: Concentration (+1)
Skill: Disable Device (+1)
Skill: Repair (+1)
Skill: Search (+1)
Skill: Spot (+0.5)
Skill: Use Magic Device (+1)
I didn't go in depth picking Feats or anything, I just wanted to layout the basic skills and level progression, etc. If you wanted, you could replace the two Rogue levels with Artificer levels, to get three extra spells and Rune Arm Use, and still be able to maximize the important skills mentioned above. I didn't put any points in Open Lock because one, there weren't enough points, and two, you can just use Knock to open pretty much anything that's locked.