6 guides
Arena tiers move generation by generation, not as a fixed ranking. F2P needs just five heroes: Molly, Alonso, Greg, Gwen, then Renee and Wayne. Slot targeting order, positioning rules, G1-G6 lineups.
If you were spending the new generation's hero shards anyway, this event's $10 paid track is the best $10 in the game. Shard costs, milestone tiers, the packs to skip, and the $20-per-generation budget.
Why 50/20/30 (Infantry/Lancer/Marksman) is the standard opening build: Lancer heroes only pop from Gen 4 Renia. Hero roadmap Gen 1-11, Lucky Wheel gem budgeting, and the 'Infantry one level ahead' ladder.
Even as a spender, do not do everything. Defer some heroes, let others lead the rallies, and put the money into widget Lv.10 on the heroes you keep for years - Jeronimo, Alonso and Mia first, then Bradley and Rufus.
Invest only in Lucky Wheel heroes and heroes you will keep for two generations or more - chasing the current generation forever is why F2P accounts end up with 3-star heroes everywhere and no shards. Picks, skips and investment ceilings for every generation.
Day-2 update to the Endless Trial guide: defensive stats feed your damage, waves run long so stacking buffs compound, and at low/mid gens Lin, Mia/Reina and Gatot beat your current-gen line-up.