Synergy Optimization: Breakpoints, Splash Packages, and Opportunity Cost

Every synergy on your board occupies slots, and every slot has an opportunity cost: the strongest thing you could otherwise do with it. Advanced synergy play is pricing each synergy against that alternative, continuously, and only keeping the ones that win the comparison.

The unit of account: board slots

At level 9 you have nine slots. A synergy that requires four dedicated units "costs" four slots. The question is never "is this synergy good?" — it's "is this synergy's bonus better than the four strongest individual units I could field instead?" For a top-tier team-wide effect, usually yes. For a mid-tier type-only buff, usually no.

Pricing a breakpoint

To decide whether to push a synergy to its next threshold:

• Gain = (next tier's effect − current tier's effect) × (units affected). A team-wide jump affecting nine units is large; a "+X to the 3 units of this type" jump is small.
• Cost = what the added unit isn't. If the added unit is a strong body you'd play anyway, cost ≈ 0 and you should always take the breakpoint. If it's a 1★ off-plan filler benched over a 2★ contributor, the cost is high.
• Take the breakpoint when gain clearly exceeds cost. This is why "free" synergies from type overlap are so strong — the cost side is near zero.

The Team Builder shows every synergy's exact thresholds and how close your board is; use it to see which breakpoints are one overlapping unit away versus which need dedicated slots.

Splash packages

A "splash" is a small package — usually 2 units — added to a comp for a specific team-wide bonus. A splash is worth it when:

• The bonus is team-wide, not type-only (a 2-unit type-only splash buffs 2 units; a 2-unit team-wide splash buffs all 9).
• The 2 units are at least okay bodies on their own — a splash of two dead 1★s for a small buff is a loss.
• You have slots to spare — level 9 with a capped core. Splashing at level 7 when you can't fit your main synergies is a mistake.

Common strong splashes are defensive (team shield / damage reduction) because they benefit your entire board including the carry, and their value doesn't depend on your comp's direction.

Opportunity cost over the game

Synergy decisions aren't one-time. As you level, slots open and the calculus changes:

• Level 6–7: you can afford one big synergy. Run it vertically; splashes are premature.
• Level 8: room for a meaningful second synergy from overlapping units.
• Level 9: room for a splash package if the ninth slot isn't better used on a strong body or a control unit.

Re-price every synergy each time you level. A partial synergy that was fine as "one unit from the breakpoint" at level 7 might be dead weight at level 9 if you never found that unit — cut it for a strong body.