I think Solar could use a change. Just my personal opinion, and I've worked with a few other players to consider these changes. I will state that these changes are with PvE specifically in mind. Everything stated here are [b]BASE STATS[/b], aspects, fragments, and modifiers will take effect upon these base values. With that being said...
I present to you... Solar 3.2.0
Keyword Changes:
Radiant: Grants +15% weapon damage for 10s. +30% for x2.
Restoration: 25HP/s (currently 30) for 10s. 50HP/s for x2.
Cure: Stacks of Cure are instead stored, consumed every 0.5s when below full health. Each stack grants 50HP (1/4 the health bar).
Ignitions/Scorch: Scorch stacks are doubled against PvE enemies, making ignitions happen much more frequently.
Super Changes:
Well of [b]Restoration[/b]: Now grants Restoration x2 and a stack of Cure every 0.5s. (Makes healing effective outside the range of the Well.)
Golden Gun: now takes weapon damage buffs from Solar Surges, like a Solar Weapon. While using the Super, Radiant you grant is Radiant x2 instead.
Burning Maul: While Sol Invictus is equipped, Fire Tornadoes grants you Restoration when passing through them.
Aspect Changes:
Sol Invictus: when you and allies stand in a sunspot, allies gain increased ability recharge rate and a stack of Cure every second. Sol Invictus duration while standing in it increased back to 20s.
Roaring Flames: Ability kills grant you a stacking Ability Damage Buff, granting you and allies within 20m Radiant when triggered.
Icarus Dash: grants a stack of cure for airborne multikills, granting 2 stacks while Heat Rises is active. After dashing, your Solar Weapons gain Scorching Rounds for 5s.
On Your Mark: Precision Kills grant a stacking buff to handling and reload speed for 10s. This stacks up to 5 times, granting your Solar Weapons Scorching Rounds while at max stacks. Allies do not gain Scorching Rounds.
Exotic Changes:
Phoenix Cradle: As allies will now benefit from sunspots at base, Phoenix Cradle will now grant Restoration to allies standing in sunspots and duration without a player standing in it has been increased from 5s to 10s.
Lorely Splendor Helm: Now grants 2 stacks of Cure every second. When critical, drops a sunspot at your location.
Lumina: effects replaced with a stack of Cure and Radiant for both user and recipient. Seeks allies, but aiming at an ally with neither buff will lock onto them.