Endwalker summoner question

[Sunako]

If you have absolutely no spellspeed and do not use swiftcast on either of the two Ruby Rites/Catastrophes or on Slipstream and you play perfectly without interrupting anything or clipping any gcds you will be out of the gem phase in 29.6 seconds, if I did the math correctly. Bahamut and Phoenix both last 20 seconds and their cooldowns start as soon as you summon them.

Your entire gem+demi-summon phase last 49.6 seconds at 0 spellspeed and if you have played perfectly you will, in theory, have up to 10.4 seconds of downtime before Bahamut or Phoenix are back up and that is when you use Ruin 3/Tri-Disaster as filler and also when you weave Searing Light and/or Radiant Aegis. That filler time shrinks the longer you're in the gem phase or you accidently mess up during it. And remember, that is at 0 spellspeed and not using swiftcast on anything. Summon Bahamut and Phoenix will be considered spells in EW, unless they change it before release, and their cooldowns will scale off your spellspeed.

If I am wrong someone please correct me.

Lets count again if you have 0 spell speed

20 sec is actually tooltip error. Bahamut/Phoenix will last only 15 seconds, so primal window will most likely last 45 seconds

Garuda Splitstream have 3.5sec recast time(this is actually pointless Swiftcast because recast time is longer than cast time? Need testing)

Garuda 3.5sec Splitstream, 2.5sec summon, 1.5sec x 4 Emerald Rite = 13 sec

Titan 2.5sec summon, 2.5sec x 4 Topaz Rite = 12.5sec

Ifrit 2.5sec summon, 2.5sec x 2 combo, 2.8sec x 2 Ruby Rite = 13.1 sec (you save 0.3sec if you Swiftcast Ruby Rite)

Overall primals 38.6sec
Primals + demi window + Ruin 4 = 56.1 sec

You only have to cast 1 - 2 ruin 3 in whole rotation depending on spell speed. Spell speed actually reduce your demi cooldown too?