Planning

These values are approximate, but also overall reliable and good to plan on.
USP values indicate total USP, not unclaimed. 

Focus on the upgrades!

Prepare to UA: 6 USP (6.4m SP).

In 1st UA: 27 USP (+21 SP)
Everything up to Rage Mode, Mega Horde, Astral Slayer, Astral Sword, & Village Key.

In 2nd UA: 45 USP (+18 USP)
Everything up to Slash The Life, Eternal Rage, & Stone of Hope.

In 3rd UA: 77 USP (+32 USP)
Everything up to Time Skip & Scared Tome of Death Pact.

In 4th UA: 102 USP (+25 USP)
Everything up to Advanced divinities, Advanced Dark Divinities, & Specter Knight Alpha.

In 5th UA: 111 USP (+9 USP)
Everything up to Book of Optimization.

In 6th UA: 124 USP (+13 USP)
Everything up to Cutting-edge Divinities & Original Sin.

In 7th UA: 135 USP (+11 USP)
Everything.

Tier List: https://idleslayer.fandom.com/wiki/Ascension_Tree_Tier_List
Strategy: https://idleslayer.fandom.com/wiki/Endgame_Strategy
USP Values: https://idleslayer.fandom.com/wiki/Ultra_Slayer_Points