My low man setup is Sam as solo dd. Light or dark SCs. With War and Sam can do the same with either masa or prime GKT if available and chango/naeg on war. It just depends on quality of dds you have, as always.
Well I'm not doing lowman, it is paired with another DD. I know you can make light on E, I love doing 4 step Radiance solo kill on SAM. What about G though with TP wiping and amnesia etc.? It isn't so great there. I know you can make light on it too though.
For F or H most people seem to be using WAR DRK, haven't seen much SAM.
What I've been doing recently is A C G E using NO 2hrs at all, saving them for a 3rd boss. In this situation SAM feels weak compared to WAR, even using club.
As far as my group is concerned we have tried a few other dd options for melee strat.
Here's what we found.
War is essential/required due to warcry helping boost everyones damage output.
Armor break helps.
Provoke to help stabilize mobs right away.
For the second dd slot we have tried.
Blu, tourbillion helps get the war straight to am 3 or just start dding earlier with stronger WSes.
Excellent crowd control when bad pulls happen.
Mighty guard can help with song optimizing.
Drk, helps with lowering mob tp moves thanks to soulenslavement.
The hp heal of origin makes me giddy whenever I see it used.
(Drk was what we thought required due to the soulenslavement factor however, on one of our runs the drk forgot to use soulenslavement on aita and DCed before our gartell fight and couldn't get back on. We still killed it just fine. This allowed us to realize trying other dds is ok.)
A second war. Works but we think it might be a wasted slot since the first wars warcry is still active before any 8/9 bosses are killed.
Drg, is pretty strong in there but we try to only have brd and cor use sb due to walling. So that leaves them with only polearm. (To be fair we have no drgs with prime.)
Sam, is probably our strongest dd in there. Prime or not.
Can do ageha so the war doesn't have to armor break.
As Prothescar mentioned yaegesumi is bonkers.
Sam and war combo is the absolute fastest we've seen on killing bosses and could probably be faster if try more with sam. Best aita kill was 35 seconds and best gartell kill was 49 secs.
(We probably got faster kills but at one point we just stopped timing them.)
We have yet to try geo over the rdm. Our current setup is WAR DD COR BRD WHM RDM. I've seen our rdms do 90+k black halos, helping with boss dpsing.