Emirates NBD Bank is offering an SPG branded CC, but with stiff fees. I think I can make it work but I'm looking for some advice.....

I'm already Marriott PP Elite as I basically live in a Marriott hotel in the UAE - I have 146 nights since I signed up to Marriott Rewards on Feb 8th 2018, with Marriott spend of $11k since that time.

The card is offering 100,000 MR points on sign up (plus Gold which obviously, I don't need), plus another 100,000 upon spend of $10k in the first 3 months - which, given that I put basically everything on it, I would do without breaking too much of a sweat........

The joining fee though is $410 with another $410 as an annual card fee.

What has really piqued my interest though is that all Marriott spend on the card gives me a further 6 points for every $1 of spend. Given that I spend about $1500 per month on Marriott hotels, that's 7,000 more points per month than I'm currently getting (though actually, thinking about it, that's not really much to shout about). I'd get 3 points for any other type of spend, which, given I put about $5k on my CC monthly would give another 10,000 points.

Should I do it ?