Welcome to the thread!
You are in a great position to rack up some serious points/miles!
If I were in your shoes I would definitely take that 100K Plat mailer, that is one that many here yearn for.
As
@palhockeymomof2 (eta: and
@tink1970) suggests, getting the CIP should be high on your priority list. Then, if you're ok with business cards, I would recommend getting those at a rate commiserate with your spending ability (CIC, CIU, any AMEX biz cards) before taking on personal cards. With Chase you need 30 days in between applications though most here are going to recommend spreading those applications out at 3-4 months intervals. That's where the AMEX biz cards really help with filling in the gaps between Chase applications.
Here's one suggestion for cards, in order:
AMEX Plat 100K
CIP
AMEX Blue Business Plus (self refer from your Plat)
CIC
[evaluate airlines, hotels that are in the areas you're interested in visiting to determine what points you want to build up]
AMEX Business (Hilton? SPG? Delta?)
CIU
CSP
Any questions, lots of people on here to help.