Since Revenant is still at a moment where it feels like an unfinished class and feels like it is still lacking a lot of customization and most Importantly Synergy between it's Legends, my suggestion would be to add an F2 for the Core Class (So Glint F2 Becomes F3 etc...), giving it a skill that should Narrow the gap between the Synergy of Legends.
The New F2 depends on which 2 Legends the Player Chooses.
Each Skill has a 20s CD and 10 Energy cost.
Shiro-Mallyx [Cursed Hand]
Chill your target and corrupt up to three boons, dealing extra damage on the number of boons removed. (basically same as "Spinal Shivers" (Necromancer Focus 5), but it is a corrupt instead of a boon removal and the direct damage is 50% weaker).
Shiro-Jallis [Jade Stone]
Gain Protection [3s] and Stability [3s].
Each Critical hit Siphons Life from enemies based on the Number of Stacks of Stability on you [Duration 3s] [No Internal CD] [Life Siphon Damage: 50] [Life Siphon Healing: 50].
Shiro-Ventari [Benevolent Shadow]
You and your allies gain Magnetic Aura [4s].
Each Critical hit heals you and your Allies based on the percentage of damage You [not your allies] do to enemies [20%].
Shiro-Glint [Overwhelming Presence]
Gain Shocking Aura [3s].
Each Critical hit Siphons Life from enemies [Duration 3s] [No Internal CD] [Life Siphon Damage: 300] [Life Siphon Healing: 300].
Mallyx-Ventari [Cursed Benevolence]
Pulses 2s Resistance each second [Duration: 4s] [240 radius].
Heals you and allies each time you inflict Torment [Duration: 4s] [240 radius] [Healing: 300].
Mallyx-Jallis [Cursed Stone]
You and your allies gain Frost Aura [4s].
Pulse-Corrupts 1 boon each second for 4s [Number of Targets: 5] [240 Radius].
Mallyx-Glint [Cold Flame]
Strike your foe [Range 600], inflicting Chill 2s, Burn 2s and Torment 2s.
For each condition on your target up to the condition threshold, inflict additional Toment stacks. (Similar to "Feast of Corruption" (Necro Scepter 3)).
Jallis-Ventari [Benevolent Stone]
Pulses Stability each second for 5 Seconds.
Pulse-Healing allies for each stack of Stability on you (100 per stack).
Jallis-Glint [Stone Endurance]
-20% damage [Duration: 4s].
1s Taunt for each enemy +1 Stack of Stability for each enemy [240 Radius].
Ventari-Glint [Benevolent Wing]
You and your Allies gain Light Aura [Duration: 4s].
Pulses Healing for each Boon on you [Number of Targets: 5] [100 per Boon] [Duration 4s].