I’m anticipating the morrsarr nerf in GHB19 and trying out aggressive builds without them. Two Eidolons of the Storm are actually pretty decent and have some advantages. Running tidecaster fuethan they get to retreat, run and charge on turns 1, 3 and 5. On turn 4 they get a 2+ save if you don’t want to charge (cast mystic shield for further fun). They hit consistently strongly (especially if buffed with artefacts) and, given retreat and charge, they can charge every single turn and are more flexible than the eels. They heal on the charge as well and don’t degrade at all with damage. With artefacts they can be given mortal wound protection too which eels lack. Finally they still have rend even if charged, which is a real problem for the eels.
I have been experimenting running 2 x of the storm plus namarti corps (for second artefact). Tool one up as an absolute beast in damage output (I like e.g. Blade of Symmetry on the spear or sword of judgement on the stormshoal) and the other one with mortal wound protection (mirrored cuirass is good fun). Build the remainder of the list to get a semi-reliable Isharann ritual (I aim for 6+) and you have two beasts healing 1+D3 every turn, rerolling all failed hits, rerolling 1s to wound, punching out damage 3-4 attacks on -2 rend. I have charged the mirrored cuirass Storm into 9 eels and wiped them (reflect mortal wounds back, a few lucky-ish rolls followed by failed battle shock)
