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In my opinion, Deleb is only strong in the early game, when forces are small and a ballista can decide the outcome of a battle, and development progresses significantly faster at first (since mines are captured more quickly). However, on large (very large) maps, where there is a chance to develop up to the Call of Urgash, Grok is preferable, as he requires far fewer levels before that very Call.
However, as I understand it, this thread was referring to the strongest units. For me, those are the Cerberi with their own "no-retaliation" and triple strike, and Nightmares with their Intimidation (or whatever it's called); moreover, these two units have huge initiative and speed—death to the enemies! True, Cerberi have somewhat weak defense, but for a level 3 unit, they are simply super. Demonesses are also not bad, thanks to their chain shot and retaliatory fire. As for Cave Lords, I personally don't like them because they are slow and hit quite weakly with magic, and they won't reach the enemy in melee either due to low speed (unless you teleport them...). IMHO.
However, as I understand it, this thread was referring to the strongest units. For me, those are the Cerberi with their own "no-retaliation" and triple strike, and Nightmares with their Intimidation (or whatever it's called); moreover, these two units have huge initiative and speed—death to the enemies! True, Cerberi have somewhat weak defense, but for a level 3 unit, they are simply super. Demonesses are also not bad, thanks to their chain shot and retaliatory fire. As for Cave Lords, I personally don't like them because they are slow and hit quite weakly with magic, and they won't reach the enemy in melee either due to low speed (unless you teleport them...). IMHO.