The following table shows the order in which to allocate your Skill Points while leveling with the Fireball Sorcerer build. You gain 59 points at Level 60 and 12 points from Renown, for a total of 71.

Order Skill Cluster
1 Fire BoltFire Bolt Rank 1 Basic SkillBasic Skill
2 Enhanced Fire BoltEnhanced Fire Bolt Basic SkillBasic Skill
3 FireballFireball Rank 1 Core SkillCore Skill
4 Flickering Fire BoltFlickering Fire Bolt Basic SkillBasic Skill
5 Enhanced FireballEnhanced Fireball Core SkillCore Skill
6 Destructive FireballDestructive Fireball Core SkillCore Skill
7 TeleportTeleport Rank 1 Defensive SkillDefensive Skill
8 Frost NovaFrost Nova Rank 1 Defensive SkillDefensive Skill
9 Enhanced Frost NovaEnhanced Frost Nova Defensive SkillDefensive Skill
10 Mystical Frost NovaMystical Frost Nova Defensive SkillDefensive Skill
11 FireballFireball Rank 2 Core SkillCore Skill
12 FireballFireball Rank 3 Core SkillCore Skill
13 FireballFireball Rank 4 Core SkillCore Skill
14 FireballFireball Rank 5 Core SkillCore Skill
15 HydraHydra Rank 1 Conjuration SkillConjuration Skill
16 Enhanced HydraEnhanced Hydra Conjuration SkillConjuration Skill
17 Invoked HydraInvoked Hydra Conjuration SkillConjuration Skill
18 Inner FlamesInner Flames Rank 1 Mastery SkillMastery Skill
19 Inner FlamesInner Flames Rank 2 Mastery SkillMastery Skill
20 Inner FlamesInner Flames Rank 3 Mastery SkillMastery Skill
21 Glass CannonGlass Cannon Rank 1 Defensive SkillDefensive Skill
22 Glass CannonGlass Cannon Rank 2 Defensive SkillDefensive Skill
23 Glass CannonGlass Cannon Rank 3 Defensive SkillDefensive Skill
24 InfernoInferno Rank 1 Ultimate SkillUltimate Skill
25 Prime InfernoPrime Inferno Ultimate SkillUltimate Skill
26 Supreme InfernoSupreme Inferno Ultimate SkillUltimate Skill
27 PermafrostPermafrost Rank 1 Ultimate SkillUltimate Skill
28 PermafrostPermafrost Rank 2 Ultimate SkillUltimate Skill
29 PermafrostPermafrost Rank 3 Ultimate SkillUltimate Skill
30 Fiery SurgeFiery Surge Rank 1 Ultimate SkillUltimate Skill
31 Fiery SurgeFiery Surge Rank 2 Ultimate SkillUltimate Skill
32 Fiery SurgeFiery Surge Rank 3 Ultimate SkillUltimate Skill
33 SoulfireSoulfire Rank 1 Ultimate SkillUltimate Skill
34 EnlightenmentEnlightenment Capstone SkillCapstone Skill
Important Respect Step: After obtaining EnlightenmentEnlightenment, reallocate 3 Skill Points invested into Fire BoltFire Bolt nodes into Frost BoltFrost Bolt, Enhanced Frost BoltEnhanced Frost Bolt, and Glinting Frost BoltGlinting Frost Bolt. The change to a Frost Skill allows you to quickly gain Enlightenment stacks when it is alternated with other Skills.

Order Skill Cluster
35 SoulfireSoulfire Rank 2 Ultimate SkillUltimate Skill
36 SoulfireSoulfire Rank 3 Ultimate SkillUltimate Skill
37 Elemental AttunementElemental Attunement Rank 1 Defensive SkillDefensive Skill
38 Elemental SynergiesElemental Synergies Rank 1 Ultimate SkillUltimate Skill
39 Elemental SynergiesElemental Synergies Rank 2 Ultimate SkillUltimate Skill
40 Elemental SynergiesElemental Synergies Rank 3 Ultimate SkillUltimate Skill
41 Elemental DominanceElemental Dominance Rank 1 Core SkillCore Skill
42 Elemental DominanceElemental Dominance Rank 2 Core SkillCore Skill
43 Elemental DominanceElemental Dominance Rank 3 Core SkillCore Skill
44 EvocationEvocation Rank 1 Ultimate SkillUltimate Skill
45 EvocationEvocation Rank 2 Ultimate SkillUltimate Skill
46 EvocationEvocation Rank 3 Ultimate SkillUltimate Skill
47 HoarfrostHoarfrost Rank 1 Ultimate SkillUltimate Skill
48 HoarfrostHoarfrost Rank 2 Ultimate SkillUltimate Skill
49 HoarfrostHoarfrost Rank 3 Ultimate SkillUltimate Skill
50 Icy TouchIcy Touch Rank 1 Ultimate SkillUltimate Skill
51 Icy TouchIcy Touch Rank 2 Ultimate SkillUltimate Skill
52 Icy TouchIcy Touch Rank 3 Ultimate SkillUltimate Skill
53 HydraHydra Rank 2 Conjuration SkillConjuration Skill
54 HydraHydra Rank 3 Conjuration SkillConjuration Skill
55 HydraHydra Rank 4 Conjuration SkillConjuration Skill
56 HydraHydra Rank 5 Conjuration SkillConjuration Skill
57 Enhanced TeleportEnhanced Teleport Defensive SkillDefensive Skill
58 Shimmering TeleportShimmering Teleport Defensive SkillDefensive Skill
59 Align the ElementsAlign the Elements Rank 1 Conjuration SkillConjuration Skill
60 ProtectionProtection Rank 1 Conjuration SkillConjuration Skill
61 ProtectionProtection Rank 2 Conjuration SkillConjuration Skill
62 ProtectionProtection Rank 3 Conjuration SkillConjuration Skill
63 Mana ShieldMana Shield Rank 1 Conjuration SkillConjuration Skill
64 Mana ShieldMana Shield Rank 2 Conjuration SkillConjuration Skill
65 Mana ShieldMana Shield Rank 3 Conjuration SkillConjuration Skill
66 Frost NovaFrost Nova Rank 2 Defensive SkillDefensive Skill
67 Frost NovaFrost Nova Rank 3 Defensive SkillDefensive Skill
68 Frost NovaFrost Nova Rank 4 Defensive SkillDefensive Skill
69 Frost NovaFrost Nova Rank 5 Defensive SkillDefensive Skill
70 TeleportTeleport Rank 2 Defensive SkillDefensive Skill
71 TeleportTeleport Rank 3 Defensive SkillDefensive Skill

Enchantment Slots
The Specialization of the Sorcerer can be unlocked at Level 15. Complete the Legacy of the Magi questline as soon as possible to gain access to your first Enchantment Slot, and then assign FireballFireball for additional AoE explosions to clear groups of enemies. Once you unlock the second slot at Level 30, assign HydraHydra to it for more spawns.