Hello everyone and welcome to my discussion on the Nemesis Llum and her 3 different forms.
Overview: Llum is pretty effective at controlling buffs on the battlefield, be it by removing buffs/debuffs or applying powerful ones herself-again, buffs AND debuffs. Battlefield Speech is a Group 4 move that not only removes all debuffs from all allies, but also gives them Double Damage+Precision. Yet another Group 4 move, Accepted Fate, removes all buffs from the enemy team and gives them Blind+Damage Reduction, and this move has 50 Base Power in addition to being unresisted. Just with these two moves alone Llum makes for an excellent supporter who can clearly define herself in every War she takes part in, and this is all without factoring in the godsend trait of Bulwark. Sadly, Light of Freedom isn't a form that I'd recommend getting despite the lowered price, but at least it's not as bad as Warthak's Skullcrusher form since Sunburn has the merit of being one of the most powerful damaging debuffs of all time.
Comparison between Iron Leader and Magical Matriarch: This is where things get hairy because it's the ancient debate of attacker vs. denier. Iron Leader is a superb attacker, armed with a second Base 50 AOE move, which is Metal based and applies Bleeding to all enemies(a Group 4 move), plus a single target Base 70 Metal based Bleed. With these moves, Iron Leader is very much capable of dispatching any Light monster, and her Base Speed of 3476 puts her at a nice state that can outspeed key threats like General Darmith, Scarr the Outcast, Harusami, Uria's Pet and Noctum, considering all of these monsters including Iron Leader run the same amount of Speed runes. Magical Matriarch, on the other hand, is a denier that uses an AOE Stun, and can utilize Sabotaged Rations, a Group 3 move that removes all buffs from the enemy team, gives them Stamina Leak and applies Special Weakness to them. Note that until the time of this post, no Light monster has ever had an AOE deny move, and that Sabotaged Rations is very useful to possibly deny General Thetys from using Stamina Devourers should you ever run into her(the move costs 120 Stamina, and after the Stamina leak she will have 116 Stamina left, which isn't enough to use the move). This form also has an elevated 3509 Speed, which extends its reach towards more threats such as all Samael forms, Zyla the Faithful, Baba Yaga and Living Forest.
Conclusion: The choice depends on whether you need a denier or attacker more when considering all the Wars she can participate in, but my choice will be Magical Matriarch because Baba Yaga was made available recently and because of the fact that she outspeeds Samael the Plague Carrier, who is arguably the most powerful monster in the entire game. This, and the fact that I have no deniers in Evil Legions and generally no proper Light monster.