Since my insta-migration ends soon, I just wanna make sure I'm on the right track with this character as I havn't played a sorcerer since GS3.

STATS (at 100)
Human
STR 60 (78)
CON 50 (81)
DEX 70 (98)
AGI 70 (91)
DIS 80 (100)
AUR 80 (100)
LOG 70 (100)
INT 50 (89)
WIS 80 (100)
INF 50 (86)

SKILLS (in ranks)
Level 25
Brawling 26
Shield 26
Physical Train 24
Climb 15
Swim 10
Arcane 26
MIU 26
Harness Power 25
Spell Aim 39
E Mana Control 26
S Mana Control 26
400s 25
100s 15
700s 20

Level 50
Brawling 51
Shield 51
Physical Train 25
Climb 30
Swim 30
Arcane 40
MIU 40
Harness Power 50
Spell Aim 77
E Mana Control 51
S Mana Control 51
400s 35
100s 39
700s 50

Level 75
Brawling 76
Shield 76
Physical Train 25
Climb 30
Swim 30
Arcane 40
MIU 40
Harness Power 75
Spell Aim 114
E Mana Control 76
S Mana Control 76
400s 65
100s 40
700s 75
Necro Lore 76

Level 100
Brawling 101
Shield 101
Physical Train 25
Climb 30
Swim 30
Arcane 40
MIU 40
Harness Power 100
Spell Aim 152
E Mana Control 101
S Mana Control 101
400s 75
100s 70
700s 100
Necro Lore 101

Questions
1. Do I really need that much Necro Lore to reap the benefits from it?
2. Same question with both the mana shares
3. Is 40 ranks of scroll/miu sufficient since I dont need the magic ranks for a runestaff?
4. Is 1.5x enough spell aim to reliably do good damage with focused implosion, assuming I'm not uphunting a ton?

Thanks