RB600 w/8 x mPCI

I want to know if somebody has experience using RB600 + 604 w/ 8 x R52H & 4 x HG2414DP, that’s a RB600 with a daughterboard and eight mPCI with four Dual polarized sector panel from Hyperlink.
What i expect to achieve is an AP able to be reached by 400 clients at the same time.

Comments will be appreciated!!!

Please, Normis or someone of you Mikrotik guys, let me know if i am well oriented.

Thx

Mrtn!!