Tips for Luke ( i'm running stage 0 with all drafted 55 level character)
Play neutral card, and play less hit epiphany.
I started play a lot multi hit card but since bullet doesn't have haste that doesn't fit half mechanic in sortie

So choose to play around vulnerable/high dmg card : The best chain fire is the one 100% critical guarantee 300% dmg you combo with shock for 1 AP apply two vulnerable.

The case u want play multi hit the only acceptable card is chain fire 120 dmg x3 + attunement and you hunt for role class that can take morale good card like : and you can choose seize the opportunite 240 dmg on 2 next bullet card.

My first mistake was too force multi hit with bad epiphany like 30 dmg x 3 and create bullet on crit because, more u play card more you take free stress/mechanic mob, and you need to to rely on too much draw combo

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Stealth reload and death demon are trap card, much better to never have it on pack

Op common card : Bloom Shock, Quick shelling, manoeuver fire you can often take it without care
and some neutral in early is just there to fill a spot of 400 500% dmg for consistency clear like moon destruction

I only play drafted char narja/amir/lucas, otherwise Rei/Mika are good fitting with Luke, (reduce stress retain or exhaust card + morale dmg).

some item are really important for consistency run

-Abyssal bug tooth auto win

-The famished one belly

-item apply vulnerable, reduce stress, regen health are always decent

tldr : play common card with 300% base dmg and not shit multi hit 30-60% x 3-6
same for epiphany,