All-Core Character HELP

[Adrayll]

So i'm gonna be playing in a Core only campaign, 32-point buy.

The character I'm trying to make will have decent skill points, helped by high int, decent-ish combat skills, and some minor spellcasting

Here's a simplified version: LN Human
Rogue 3/Fighter 2/Assassin 5/Arcane Trickster 3/Dragon Disciple 7

Note that my DM has waived the requirement of mage hand from Arcane Trickster, and the Evil alignment requirement from Assassin

Here's the full version

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Starting Ability Scores: STR 16, DEX 15, CON 12, INT 16, WIS 8, CHA 8
Languages: Common, Draconic, Elven, Dwarven
Final Hit Dice: 2d10+3d4+8d6+7d12
Final Ability Scores: STR 20, DEX 20, CON 14, INT 16, WIS 8, CHA 8

Level 1: Rogue
Starting Feat: Two Weapon Fighting
Human Bonus Feat: Power Attack
Skills bought: 4 Decipher Script, 4 Disable Device, 4 Disguise, 4 Escape Artist, 4 Hide, 4 Listen, 4 Move Silently, 4 Open Lock, 4 Search, 4 UMD, 4 Use Rope
Saves (total): FORT +1, REF +4, WILL -1
BAB: +0
Class Abilities granted/improved: 1d6 Sneak Attack, trapfinding

Level 2: Fighter
Fighter Bonus Feat: Quick Draw
Skills bought: 5 Climb, 1 Ride
Saves (total): FORT +3, REF +4, WILL -1
BAB: +1

Level 3: Fighter
Fighter Bonus Feat: Cleave
Feat: Combat Reflexes
Skills bought: 1 Climb, 5 Jump
Saves (total): FORT +4, REF +4, WILL -1
BAB: +2

Level 4: Rogue
Ability Score Increase: DEX
Skills bought: 3 Decipher Script, 3 Disable Device, 3 Hide, 3 Move Silently
Saves (total): FORT +4, REF +6, WILL -1
BAB: +3
Class Abilities granted/improved: Evasion

Level 5: Rogue
Skills bought: 1 Disable Device, 1 Hide, 1 Move Silently, 4 UMD, 3 Escape Artist, 1(cc) Knowledge (arcana)
Saves (total): FORT +5, REF +6, WILL +0
BAB: +4
Class Abilities granted/improved: Sneak Attack 2d6, trap sense +1

Level 6: Assassin
Feat: Blind-fight
Skills bought: 3(cc) Knowledge (Arcana), 1 UMD, 1 Open Locks
Saves (total): FORT +5, REF +8, WILL +0
BAB: +4
Class Abilities granted/improved: Sneak attack 3d6, death attack, poison use, spells
Spells Learned: 1st- True Strike, Obscuring Mist

Level 7: Assassin
Skills bought: 1 UMD, 2 Disable Device, 5 Open Lock
Saves (total): FORT +5, REF +9, WILL +0
BAB: +5
Class Abilities granted/improved: +1 vs. poison, uncanny dodge
Spells Learned: 1st- Disguise Self

Level 8: Assassin
Ability Score Increase: DEX
Skills bought: 1 UMD, 1 Disable Device, 1 Open Lock, 5 Search
Saves (total): FORT +6, REF +9, WILL +1
BAB: +6
Class Abilities granted/improved: 4d6 sneak attack
Spells Learned: 2nd - invisibility, spider climb

Level 9: Assassin
Feat: Improved Two Weapon Fighting
Skills bought: 1 UMD, 1 Disable Device, 1 Open Lock, 2 Search, 3 Move Silently
Saves (total): FORT +6, REF +10, WILL +1
BAB: +7
Class Abilities granted/improved: +2 vs. poison
Spells Learned: 1st - ghost sound, 2nd - darkness

Level 10: Assassin
Skills bought: 1 UMD, 1 Disable Device, 1 Open Lock, 1 Search, 3 Move Silently, 1 Use Rope
Saves (total): FORT +6, REF +10, WILL +1
BAB: +7
Class Abilities granted/improved: 5d6 sneak attack, improved uncanny dodge
Spells Learned: 3rd - deeper darkness, false life

Level 11: Arcane Trickster
Skills bought: 1(cc) UMD, 1 Disable Device, 1 Open Lock, 1 Search, 1 Move Silently, 2 Knowledge (Arcana)
Saves (total): FORT +6, REF +12, WILL +3
BAB: +7
Class Abilities granted/improved: ranged legerdemain 1/day
Spells Learned: 2nd - pass w/o trace 3rd - magic circle against good

Level 12: Arcane Trickster
Ability Score Increase: DEX
Feat: Combat Casting
Skills bought: 1(cc) UMD, 1 Disable Device, 1 Open Lock, 1 Search, 1 Move Silently, 2 Knowledge (Arcana)
Saves (total): FORT +6, REF +14, WILL +4
BAB: +8
Class Abilities granted/improved: 6d6 sneak attack
Spells Learned: 4th - Freedom of Movement, Greater Invisibility

Level 13: Arcane Trickster
Skills bought: 1(cc) UMD, 1 Disable Device, 1 Open Lock, 1 Search, 1 Move Silently, 2 Hide
Saves (total): FORT +7, REF +14, WILL +4
BAB: +8
Class Abilities granted/improved: impromtu sneak attack 1/day
Spells Learned: 3rd - deep slumber 4th - Locate Creature

Level 14: Dragon Disciple
Dragon Type: Silver
Skills bought: 6 Spellcraft
Saves (total): FORT +9, REF +14, WILL +6
BAB: +8
Class Abilities granted/improved: Nat. Armor +1, Bonus Spell (4th)

Level 15: Dragon Disciple
Feat: Two-Weapon Defense
Skills bought: 1 Knowledge (Local), 1 Knowledge (Religion), 1 Knowledge (Engineering), 1 Knowledge (Geography), 1 Knowledge (History)
Saves (total): FORT +10, REF +14, WILL +7
BAB: +9
Class Abilities granted/improved: STR +2, Claws and bite, Bonus Spell (2nd)

Level 16: Dragon Disciple
Ability Score Increase: DEX
Skills bought: 1 Knowledge (Nature), 1 Knowledge (Religion), 1 Knowledge (Nobility and Royalty), 1 Knowledge (The Planes), 1 Knowledge (Dungeoneering)
Saves (total): FORT +10, REF +15, WILL +7
BAB: +10
Class Abilities granted/improved: Breath Weapon 2d8

Level 17: Dragon Disciple
Skills bought: 5 Search, 1 Spellcraft
Saves (total): FORT +11, REF +15, WILL +8
BAB: +11
Class Abilities granted/improved: STR +2, nat. armor +2, Bonus Spell (1st)

Level 18: Dragon Disciple
Feat: Greater Two Weapon Fighting
Skills bought: 1 Search, 5 Spellcraft
Saves (total): FORT +11, REF +15, WILL +8
BAB: +11
Class Abilities granted/improved: Blindsense 30ft, Bonus Spell (4th)

Level 19: Dragon Disciple
Skills bought: 1 Search, 5 Spellcraft
Saves (total): FORT +13, REF +16, WILL +9
BAB: +12
Class Abilities granted/improved: CON +2, Bonus Spell (4th)

Level 20: Dragon Disciple
Ability Score Increase: DEX
Skills bought: 1 Search, 5 Spellcraft
Saves (total): FORT +13, REF +17, WILL +9
BAB: +13
Class Abilities granted/improved: Breath Weapon 4d8, Nat. Armor +3