User blog:WatchThePowerOfAura/Which of these unit combos is better for LS?

So a friend and I got into an argument about which of these pairs of units would be better for Leaders?

My opinion - Colt + Claire

His opinion - Zedus + Owen

I can see his argument: he said you get an extra 5% boost to all stats, and more crit damage from the two. And when Zedus' 7-star comes out, he'll be even stronger.

But then I retaliated with the fact that Zedus and Owen's BB + SBB buffs are inferior to Colt + Claire's BB/SBB/UBB buffs. And if C+C's leader skills are combined, Everyone gets 30% boost to all parameters, and the siblings get 60% to everything (even more if you include their ES spheres).

So which is better? Here's their Leader Skills and BB/SBB/UBB data (from the wiki), so you don't have to go searching: (Thanks in advance for responding!)

Owen - Leader Skill:   Aurora's Supremacy
[Hit Points/Attack/Defense/Recovery/Brave Burst] 35% boost to all parameters, boosts critical hit damage  & hugely boosts BB gauge on critical Brave Burst: Sparkling Blazing Slash[Support/Offense] 18 combo powerful Fire attack on all enemies, probable Injury and Weak effect  & boosts critical hit rate  for 3 turnsS uper  BB: Ars Magna[Support/Offense] 25 combo powerful Fire attack on all enemies & boosts all allies' Atk relative to their Def  for 3 turns

Zedus - Leader Skill: Zedus' Providence
[Attack] Large boost in critical hit damage , damage dealt during Spark  & 15% boost to critical hit rateBrave Burst: Thunder Blitz[Support/Offense] 9 combo powerful Thunder attack on single enemy & boost to Spark damage  for 3 turnsS uper  BB: Judgment[Support/Offense] 3 combo massive Thunder attack on all enemies, boost to Spark damage  for 3 turns & adds chance of decreasing Atk and Def  for 1 turn == Colt  - Leader Skill: Flashing Divine Grace== [Hit Points/Attack/Recovery] Greatly boosts critical damage  & boosts max HP and Rec by 30%Extra Skill: Bonds of Flame[Requires : Ice Blade or Claire] 30% boost to all parameters when Ice Blade is equipped, or whenClaire is in the same squadBrave Burst: Glace Isberg[Support/Offense] 17 combo powerful Water attack on all enemies, boosts critical hit rate  for all allies for 3 turns & gradually recovers BB gauge S uper  BB: Heilcruseide[Support/Offense] 19 combo powerful Water attack on all enemies, boosts critical hit rate for 3 turns  & <span style="border-bottom-width:1px;border-bottom-style:dotted;border-bottom-color:rgb(0,0,0);" title="Fills 5 BC">gradually recovers BB gauge  for 3 turnsU ltimate  BB: Luzgrake Ace[Support/Offense] 21 combo massive Water attack on all enemies, <span style="border-bottom-width:1px;border-bottom-style:dotted;border-bottom-color:rgb(0,0,0);" title="70% boost">boosts critical hit rate for all allies for 3 turns  & <span style="border-bottom-width:1px;border-bottom-style:dotted;border-bottom-color:rgb(0,0,0);" title="200% boost">greatly boosts Atk  == Claire  - Leader Skill: Glorious Deity== [Attack/Defense] <span style="border-bottom-width:1px;border-bottom-style:dotted;border-bottom-color:rgb(0,0,0);" title="75% boost">Large boost in damage dealt during Spark  & 30% boost to Atk and Def of all typesExtra Skill: Bonds of Ice<p style="text-align:right;">[<span style="border-bottom-width:1px;border-bottom-style:dotted;border-bottom-color:rgb(0,0,0);" title="Condition needed to activate this skill">Requires : Blaze Lance or Colt] 30% boost to all parameters when Blaze Lance is equipped, or when Colt is in the same squadBrave Burst: Flam Areadbhar[Support/Offense] 20 combo powerful Fire attack on all foes & <span style="border-bottom-width:1px;border-bottom-style:dotted;border-bottom-color:rgb(0,0,0);" title="70% boost at max level">boosts Spark damage  for 3 turnsS uper  BB: De Zon Bleize[Support/Offense] 30 combo powerful Fire attack on all foes, <span style="border-bottom-width:1px;border-bottom-style:dotted;border-bottom-color:rgb(0,0,0);" title="80% boost at max level">boosts Spark damage for 3 turns  & <span style="border-bottom-width:1px;border-bottom-style:dotted;border-bottom-color:rgb(0,0,0);" title="30% boost at max level">boosts BC drop rate U ltimate  BB: Soul Exifience[Support/Offense] 40 combo massive Fire attack on all enemies, <span style="border-bottom-width:1px;border-bottom-style:dotted;border-bottom-color:rgb(0,0,0);" title="130% boost">boosts Spark damage for 3 turns  & <span style="border-bottom-width:1px;border-bottom-style:dotted;border-bottom-color:rgb(0,0,0);" title="200% boost">greatly boosts Atk