The documented CP anchors
Champion points cap at 3,600 total, earned at 400,000 XP each after level 50. Each of the three constellations (Warfare, Fitness, Craft) holds 4 slottable stars at 50 CP each, so 600 CP maxes every slottable in the game. Guides converge on roughly 2,400 CP to max everything that matters, and performance soft-caps well before the 3,600 hard cap.
Slottables first
Slottable stars are the active perks on your champion bar and give the biggest per-point gains, so the suggested split fills them before passives: each tree's first 200 CP go to its 4 slottables. The focus weights shift the split (DPS leans Warfare, tanks lean Fitness, crafters lean Craft), and a full respec costs only 3,000 gold if you change your mind.
Worked example
1,200 CP, DPS focus (40/35/25 split): Warfare = 480, Fitness = 420, Craft = 300. Slottables maxed: 4 + 4 + 4 = 12 / 12, every slottable in the game is filled. Next milestone: 2,400 CP, needing 1,200 more.
Use it as a plan, not a build
This gives you the point budget per tree. Which exact stars to slot (Deadly Aim, Biting Aura, Boundless Vitality, Steed's Blessing, and the rest) depends on your class and role, so take the budget to a build guide for your setup and spend inside it.