idk.. seems pretty straightforward... no?
If you're multi-tabling turbo STT/SNG & if your goal is to eventually be playing many tables than yah, stacking would be the way to go. I'd just add one table at a time, gradually adding more over a period of time as I become comfortable with the amount I'm playing.
I personally don't stack tables ever because I never play that many at a time (maybe 4-6 tables & more often lately when playing SNG's I'm playing the 27's & 45's). Tiling is far better for me as I'm able to see what's going on in each game (player reads, stack sizes, etc. & am able to find better spots imo.. obv. less applicable in a turbo STT/SNG where the play is more robotic (< not sure if that's the word I'm looking for.. but prob know what I mean).
Tiling for me has been working fine with 4-6tables, even up to 8mtts at a time (also picked up another monitor at Christmas, a 24" that I can tile 12tables on with next to no overlap & am used to seeing them much smaller than this on laptops& with 9 on the new monitor they look frigg'n monstrous compared with what I'm used to). I'm also almost always playing on multiple sites while playing which makes tiling a necessity as well (I'll be playing 1-3 games from maybe 2 -4 sites).
Something I've also been using lately (past few mos.) I've found quite helpful is 'TournamentShark' by pokerprolabs. Quickly recognize who the regs. are, who are the winning players, ,who are the complete rookies, etc., which helps alot in hand-reading & decision making obv.
Depends what I'm playing as far as how many tables (again way different from someone who's playing the same games (STT-Turbo) at same buyin)... I might fire up a half-dozen micro MTT, or maybe 3 or 4 slightly bigger ones (bigger being relative.... 'bigger as far as what I'd typically play in') & for sure find I can play much better while playing fewer tables. I'd assume for someone with a fair bit of experience playing STT-Turbo it wouldn't be as big of a difference with an extra table or two,... just going to have to make your decisions a bit faster.
Question: Do you have a goal for how many tables you want to be playing at a particular buyin before moving up? I've watched guys in vids. playing ~20tables... pace seems pretty frantic but obviously do-able. I imagine it'd be fairly draining/tiring over a period of time.