From The Code Name is Sailor V (that's my translated title for Code Name wa Sailor V), we have Kaitō Ace - who is also known as Adonis from Venus, Danburite the Shitennō apprentice (at least I think he is an apprentice to Kuntzite) , and Saijō Ace the idol and civilian of Earth - who is the male partner (and potential love interest) of Sailor V[enus]. Kaitō Ace, basically (or theoretically) translated to "Ace the Gentleman Thief", has a talent a reading cards (Tarot?) and an offensive ability which has the incantation "Delicious Four Card Shot!" and consists of four aces being thrown (shown here: http://www.geocities.ws/jadebear2/svmanga10.html ). I think that his symbolic representation is an ace of hearts. That's one.

From Beautiful Soldier Sailor Moon (that's my translated title for Bishōjo Senshi Sailor Moon), we have Tuxedo Mask - who is also known as Prince Endymion the prince of Terra Defensor of Earth (my name for the entire kingdom that will be called Golden Kingdom in the modern day - and it that includes the Holy Grounds called Elysion) and the one who the Shitennō should guard and lives at the Golden, and Chiba Mamoru the civilian of Earth, and he will be known as King Endymion of Crystal Tokyo and lives at the Crystal Palace - who is the male partner and true love interest of Sailor Moon (and the rest of her incarnations). Tuxedo Mask, that is the literal translation of "Tuxedo Kamen", has a talent at reading the Earth - Makoto calls this ability "psychometry" (alluded to in the anime but is flat out stated in the manga), an offensive ability that consists of many roses being thrown (shown in the anime), he is also prone to throwing a single rose (red, white, or black - situation depending) to hinder the enemies of his love - the anime shows this well. As a Soldier, he represents the Earth and it's link to both the Sun and the Moon. He is symbolically represented by a single red rose. That's two.

The one I'm most curious about is Helios, the priest of Elysion. He is also the "brother" of the Maenads (priestesses of Elysion) who work in Elysion. Pegasus, a golden horned white winged horse, is Helios's favorite steed in the manga. I'm wondering what type of symbolic "weapon" he should have if he was to become a Soldier represent the Sun (not the Earth, that's Mamoru's job) and it's connection to the Earth and it's link to the Moon - the weapon is not going to be a mirror! My question is what? What do you think would be a fitting offensive/attack "weapon" for Helios (or Sun Rêve [Translation: Sun Dream])?

A few quick notes:
1 - There is a curious connection between Elysion (but not the Golden Kingdom [formerly called Terra Defensor]), Helios, the planet Earth, and Mamoru/Endymion. If one is seriously ill, then the other three show symptoms as well. The Dream Arc of the manga shows this really well, it is alluded to in the corresponding season of the anime.

2 - In this case Helios and Chibi-Usagi represent the link between the Sun and the Moon, while Mamoru and Usagi represent the link between the Earth and the Moon.

I agree with you on Ace; his attribute is the Ace of Heart, and he uses them in an offensive manner similar to how Princess Kakyuu uses cards in sailor senshi form.

For Mamoru, the roses are certainly an offensive weapon, but in the manga Tuxedo Kamen also has the attack, "Tuxedo La Smoking Bomber". He can also use a sword in both the anime and manga, and in the anime we see him using his cane as a weapon against villains as well.

Helios is a bit more tricky, as I think his powers are defensive in nature. Helios is the priest of Elysion, and from his station and his character design he does not appear to be designed for offensive capabilities. We see in the manga that Helios can call on Elysion's power to create large pillars of purifying crystals. This ties in with the unicorn imagery that's associated with him, as unicorns are allegories of purity. Also, clear quartz crystals are associated with the ability to amplify one's energy. This can mean the crystals of Elysion that Helios calls upon can also help to amplify the powers of others.

I had not forgotten about the rest of the things that Tuxedo Mask has. I just felt like using the more iconic one, his roses. About his "Tuxedo La Smoking Bomber" ability, I don't understand what it does... Does it create a smokescreen?

Based on you said, I'm thinking of giving Helios (who will be more on the defensive side of actions) the following:
• "white sun crystals" as an offensive "weapon"
• an ability to conjure cages around his targets — in this case that cage would be an ability that delays the one attacking (such as a yōma), perhaps with the incantation of "Solar Rêve Cage!" (not sure about the incantation).
• the ability to manifest a gold wall-like shield to separate the attacker from its intended target (that is stop Sailor Chibi-Moon from getting injured by a yōma's attack).

What do you think?