That's how I see the main use of Ithilmar. Have an entire detachment of Eldar equipped with it, and have them be our face breakers who are first in and last out when assaulting fortifications.
A full detachment could easily be over fifty infantry. The Heavy Gravity detachment I sketched out
before had 78. Excluding transports and jetbikes just the infantry would cost;
78 Ithilmar
78 Energy Dispersion Field
12 Melee Gravity Blades
12 Graviton Sheer Rifles
36 Power Mauls
36 Sunblaster Culverins
24 Melee Rending Blades
24 Heavy Point Singularity Projectors
Plus Weapons for HQ unit
Including the HQ unit, that's eight squads.
The Elites with Gravity Swords and Grav Sheer Rifles cost 65, the Sunblaster+Power Maul armed troops cost 64 and the Point Singularity Projector+Rending Blade armed troops cost 62. All together that's 4,572 EP for the soldiers, with the HQ cost on top. Assuming there were six of them, we'd probably give them Exotic weapons, say, half with Fatecaster Rifles and half with Starcarvers. Now, both the Warseer and the Bonesinger are psykers, so they'd probably be equipped with Force Staves, and the others could have Gravity Blades. That adds up to 435.
In total; that's 5,007 points. It's very nearly one Forge use, if we wanted to print out the gear for the infantry.
Eight assault transports at an average of say 250 EP each would be a quite reasonable cost for them, but we would have to design the new hull first.
In the interim, we'd probably want to deliver these units by temporary Webway burrowings or directly from boarding craft.
One other thing we also might want to consider for the short run is whether we want to form some exotic armed Ithilmar or armoured detachments.
If we want to contribute to Saim-Ham's Wild Hunt we're not going to be sending large numbers of troops, so we might instead want to send out some exceptionally effective ones filling a niche that Eldar don't have many units for.
This applies to both the Fata Morgana and Ithilmar equipped detachments. An initial run of Exotic Fata Morganas each with a Starlance and a Fareshredder Cannon recycled from our existing vehicles replacing the Needlestorm and Blazefire alongside Hearthguard infantry squads with their armour swapped for Ithilmar (VGW for jetbikes) could punch well above their numbers might suggest. We'd probably want to give the infantry Energy Dispersion Fields and Gravity Blades, but the combination of massive protection and exotic weapons could make them very effective.
