As a returning player it took me some time to figure out how to build my LI set for soloing. Here's what I came up with from this forum and other sites. Working well so I thought it might be useful to others in the same boat. Stats are 121 Incomparable and these traceries presume a separate weapon and book for healing.
Minstrel Weapon
Heraldic Tracery
Heraldry of the Eagle
+2721 Will
+1710 Vitality
+24494 Tactical Mastery Rating
Word of Power
Single Target Attack Criticals
+5% Single Target Attack Crit Chance
+20% Single Target Attack Crit Magnitude
+12852 Critical Rating
Word of Power
Single Target Attack Damage
+22% Single Target Attack Damage
+12247 Physical Mastery Rating
+12247 Tactical Mastery Rating
Word of Mastery
Call of Oromë and Eärendil Damage
+50% Call of Oromë and Eärendil Damage
+ 1360 Will
Word of Mastery
Call of the Second Age Damage
+50% Call of the Second Age Damage
+ 1360 Will
Word of Mastery
Minor Ballad Damage
+47% Minor Ballad Damage
+12247 Tactical Mastery Rating
Word of Mastery
Piercing Cry Damage
+50% Piercing Cry damage
+12247 Tactical Mastery Rating
Word of Mastery
Target Resist Change: Call to War Skills
-5% Target Resist Chance (Call to War)
+15120 Finesse Rating
Word of Mastery
Call to Fate Critical Multiplier
+35% Call to Fate Critical Multiplier
+27760 Critical Rating
Word of Craft
Ascendent Light
+14459 Critical Rating
(2) +15% Light Damage
(4) +37800 Outgoing Healing
Word of Craft
Ascendent Light
+14459 Critical Rating
(2) +15% Light Damage
(4) +37800 Outgoing Healing
Word of Craft (unlocked with Gundabad)
Empowered Destruction
+14459 Critical Rating
Minstrel Songbook
Heraldic Tracery
Heraldry of the Eagle
+3742 Will
+2565 Vitality
+33680 Tactical Mastery Rating
Word of Power
Ranged Attack Extension
+10 Ranged Attack Extension
+26454 Physical Mastery Rating
+26454 Tactical Mastery Rating
Word of Power
Area Effect Attack Criticals
+5% Area Effect Attack Crit Chance
+30% Area Effect Attack Crit Magnitude
+12852 Critical Rating
Word of Power
Area Effect Attack Damage
+25% Area Effect Attack Damage
+12247 Physical Mastery Rating
+12247 Tactical Mastery Rating
Word of Mastery
Anthem of War Damage Buffs
+2% Anthem of War Damage (Physical)
+12247 Tactical Mastery Rating
Word of Mastery
Cry of Chorus Cooldown
-30 Cry of the Chorus Cooldown
+30240 Outgoing Healing Rating
Word of Mastery
Echoes of Battle Resistance Rating Debuff
+15120 Finesse Rating
Word of Mastery
Hammerhand Skills Bubble Magnitude
+ 40% Hammerhand Skills Bubble Magnitude
+10133 Tactical Mitigation
Word of Mastery
Healing Skills Induction Time & Critical Change
+10% Healing Skills Induction Time
+2% Healing Critical Chance
+12852 Critical Rating
Word of Mastery
Anthem Duration
+60 Anthem Duration
+1360 Will
Word of Craft
Ascendent Light
+14459 Critical Rating
(2) +15% Light Damage
(4) +37800 Outgoing Healing
Word of Craft
Ascendent Light
+14459 Critical Rating
(2) +15% Light Damage
(4) +37800 Outgoing Healing
Word of Craft (unlocked with Gundabad)
Empowered Destruction
+14459 Critical Rating
Credit for the format to LotroHQ https://lotrohq.com; a great source for endgame group content builds.
Hope this helps!