I appreciate this is not relevant to the original post (about pulling them individually), its more directed at the discussion that followed, but hope it helps none the less:
When we go to Xarc we don't sac pull any of the NM towers. In fact the only sac pulls we do are for the second TK (tower with the eyes) and to split the demon wall in half. Instead, we opt for 3 PLD's in the zone. I'll explain...
We use a PLD for main /assist'ing. I appreciate some shells use a DD or whatever, but using a PLD gives our main /assist an opportunity to target the mob before the rest of the alliance and get a provoke or flash on it. The other two PLD's hold hate from the sleepers, which becomes a much bigger advantage on the larger pulls later in the run.
When we get to an NM tower. Main /assist will move to one of the DD's, and a healer (usually WHM or someone who can Erase) is paired up with each PLD. The PLD's are then each assigned one of the three NM's from that tower. A THF will pop Flee, sight aggro the eyes on the tower, and then circle the tower kiting them. The DD main /assist will start working with the alliance to kill the eyes while the THF kites them around the tower. The THF will never be kiting more than two eyes anyway, as the main /assist will pull one off straight after the pull, but even if the THF gets killed it's no real issue as the eyes die quickly anyway.
As the eyes are aggro'd, the three demon NM's will spawn. Each PLD will Provoke / Flash their assigned NM and pull it to one side with their healer. PLD's can straight-up hold the demon NM's for anything up to 5-10 minutes each depending on the NM's job type and their gear etc, before they / the healer start to get low on MP. I'm usually one of the three PLD's, and I wouldn't say any of our PLD's are super-pimped, but all decently geared (Homam, M.Body / ACP / Valor etc), but none have Ares or Relics. If the NM is a BLM then obviously kite it around the tower, but you get the idea...
The DD's work through the eyes, and the main /assist will then take on the NM's which are being held in order of their threat level to the PLD holding them. Ie. SMN / BST / NIN (because of their 2 hour abilities / pets) > BLM / BRD (annoying AoE's) > heavy DD types > THF / PLD's etc > WHM's. We have got unlucky before on a Sleepga from an eye after the pull and lost a holding PLD, and I have straight up tanked 2 of the NM's at once. So I have no doubts that any reasonably skilled / geared PLD could do this, I am by no means the best in my shell.
The other nice perk to this strategy is it gives the holding PLD's ample time to build hate on the demon NM they are handling. This means when the alliance gets to it and it two-hours, it doesn't go Hundred Fisting (or w/e the relevant nasty 2 hour may be...) the DD's or the mages. As the NM's drop that PLD and his healer will move with the alliance to the next NM until all 3 NM's are down.
Alliance heads to the next tower, and repeats the process.
I know everyone has their own way, this way works really well for us. If you struggle with the NM towers, or sac pulls seem to keep linking mobs from other parts of the zone etc, give this a shot. Let me know what you think! =D