Since the OP wants to dual box, remote repair, as well as remote capacitor transfer, is more efficient then local (capacitor) repair, as there’s a skill to improve the capacitor usage of remote repair modules/transfer.
Also, de-buffing the enemy is more efficient then buffing yourself even when using a single account. I.e. within the range a typhoon can lock targets, a Target Painter provides more application bonus then a precision scripted Guidance Computer. To the heavy missiles that is. If you take the drones into consideration, the TP provides the same bonus to them as it provides to the missiles, while the guidance computer provides no application bonus at all to the drones.
Besides drones, of cause, the other capsuleer’s ship and drones, too, will take advantage of the debuff effect the first capsuleer provided to a target, and that’s without having to use his own modules at all.
If your tank is too poor, then your resistances are too low. Frequently, having high resistances with not so glorious raw repair amounts can outperform having low resistances and high repair amount.
As the XLSB consumed alot of capacitor, a significant part of the TFI fit revolves around capacitor stability…
For example, the 3 Capacitor Flux Coils are there only to accomodate the X-Large Shield Booster.
If they are replaced by 2 Multispectrum Membranes and a Medium (!) Armor Repair Module, the armor resistances will be so high that the repair effect gets doubled, bringing the medium repair module to about 60% of the repair amount that is provided by the XLSB … while freeing the mid slot of the XLSB…
Armor Tank can be made more efficiently by installing Nanobot Accelerator
rigs, where the T1 variants will push the Medium Armor Tank module into the effect level of the XLSB, while being less expensive then the T2 capacitor rigs.
As the fit isn’t constrained by the XLSB’s fitting requirements any more, the MWD can be replaced by a Quad Lif one, which has less negative capacitor modifier then the Compact one, and less signature bloom, too.
The XLSB slot can now be used to install an Afterburner, and the Meta Cap Bat be turned into a T2 one. At this point, the Phoon has as much tank and damage (which wasn’t touched) as the XLSB fit, a second propulsion module, and can still zoom around with MWD for 3 minutes w/o running out of capacitor, just as the XLSB could, but can AB for longer then that, and is 100m isk less expensive then the XLSB fit as it doesn’t use T2 rigs.
You can put those 100m isk into a deadspace tank module to gain more capacitor efficiency and better tank over the XLSB fit, and still be less expensive:
[Typhoon Fleet Issue, Modified]
Ballistic Control System II
Ballistic Control System II
Ballistic Control System II
Multispectrum Energized Membrane II
Multispectrum Energized Membrane II
Damage Control II
Corelum C-Type Medium Armor Repairer
100MN Afterburner II
Missile Guidance Computer II
Missile Guidance Computer II
Large Cap Battery II
500MN Quad LiF Restrained Microwarpdrive
Rapid Heavy Missile Launcher II, Scourge Precision Heavy Missile
Rapid Heavy Missile Launcher II, Scourge Precision Heavy Missile
Rapid Heavy Missile Launcher II, Scourge Precision Heavy Missile
Rapid Heavy Missile Launcher II, Scourge Precision Heavy Missile
Rapid Heavy Missile Launcher II, Scourge Precision Heavy Missile
Rapid Heavy Missile Launcher II, Scourge Precision Heavy Missile
Auto Targeting System I
[Empty High slot]
Large Nanobot Accelerator I
Large Nanobot Accelerator I
Large Nanobot Accelerator I
Hobgoblin II x5
Hammerhead II x5
Ogre II x5
Nova Fury Heavy Missile x1500
Nova Auto-Targeting Heavy Missile I x1500
Caldari Navy Scourge Heavy Missile x1650
Missile Precision Script x2
Despite having more tank, it is less expensive.
Now let’s take off the Autotargetter. It might be good for the lazyness, but when you have two ships on grid, odds are that the NPCs won’t target you, but your alt, and in that case the Autotargetter won’t work. Replace the AT, and the empty slot next to it, too, by Large Capacitor Transmitters. After all, we’re multiboxing, so that’s +30GJ/s we can cap-chain with our alt. As it doesn’t fit, downgrade the Cap Battery into a Cap Recharger, which provides a very similar capacitor repair rate but without the PG requirement, and we don’t need buffer as long as we can keep the Transmitters operating:
[Typhoon Fleet Issue, Cap Chain]
Ballistic Control System II
Ballistic Control System II
Ballistic Control System II
Multispectrum Energized Membrane II
Multispectrum Energized Membrane II
Damage Control II
Corelum C-Type Medium Armor Repairer
100MN Afterburner II
Missile Guidance Computer II
Missile Guidance Computer II
Cap Recharger II
500MN Quad LiF Restrained Microwarpdrive
Rapid Heavy Missile Launcher II, Scourge Precision Heavy Missile
Rapid Heavy Missile Launcher II, Scourge Precision Heavy Missile
Rapid Heavy Missile Launcher II, Scourge Precision Heavy Missile
Rapid Heavy Missile Launcher II, Scourge Precision Heavy Missile
Rapid Heavy Missile Launcher II, Scourge Precision Heavy Missile
Rapid Heavy Missile Launcher II, Scourge Precision Heavy Missile
Large Remote Capacitor Transmitter II
Large Remote Capacitor Transmitter II
Large Nanobot Accelerator I
Large Nanobot Accelerator I
Large Nanobot Accelerator I
Hobgoblin II x5
Hammerhead II x5
Ogre II x5
Nova Fury Heavy Missile x1500
Nova Auto-Targeting Heavy Missile I x1500
Caldari Navy Scourge Heavy Missile x1650
Missile Precision Script x2
20 minutes microwarp and capacitor stable during afterburner or unpropulsed manouvering, while still less expensive and more tanky then the XLSB fit.
Note that IMO, 210-ish ehp/s tank, on a battleship, is too little to feel comfortable.