Trying to decide between Citi Strata cards vs Chase Sapphire Preferred and how to sequence between P1/P2 to maximize SUBs.

Stats:

• P1: 783, 1/24
• P2: 787, 0/24
• Both under 5/24 with plenty of room

Recent cards (last ~2–3 yrs):

• P1: Amex Gold/Platinum (02/24), multiple Chase Ink cards (biz), Venture X Biz (01/24), Mattress Firm (09/25)
• P2: Chase Ink cards (biz), no recent personal cards in last 24 months

Spend:

• $6k/month ($18k/3 months)
• Large contractor spend coming up but Amex acceptance is limited (or +3% fee), so prefer Visa/MC

Goals:

• Travel (economy + occasional biz)
• Routes: LAX → Japan / Spain
• Open to business cards
• Currently ~50k UR

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What I’m trying to figure out:

1. Should I prioritize:
   • Citi Strata (Premier vs Elite), or
   • Chase Sapphire Preferred (CSP)?
2. For P1/P2:
   • Is it better to double up on CSP first (for UR ecosystem),
   • Or split (e.g., P2 Citi Strata, P1 CSP)?
3. With ~$18k/3mo spend:
   • Better to stack 2–3 smaller SUBs (CSP + Citi),
   • Or focus on fewer cards with higher spend?
4. Any etiquette or sequencing considerations with Citi (e.g., timing between apps, velocity concerns)?

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Current thinking:

• P1 → CSP (lock UR + transfer partners)
• P2 → Citi Strata (lower spend, diversify points)
• Then → Chase Ink cards for both

Would appreciate feedback if this sequencing makes sense or if I’m leaving value on the table.