I definitely agree, especially for the induction furnace... I mean it uses an advanced machine, is obviously tier 2, yet no usage of energy crystals.
Indeed. I see pretty much no use for energy crystals as is. Laptron and energy crystals are only useable to move energy around between mfes or mfsus, and hence since wiring is almost always better, unless using something like Portal mod, or going to the nether. Batteries are effective for mobile recharging, but a batpack is ALMOST better. It does have one really annoying limitation, that it does not allow you to manually recharge your tools. I am wondering how it is imagined to work. Basically, I use a jetpack most of the time (electric ofc) so I can keep my mobility. However, since electric tools last such a short time, I have to use a batpack or batteries as well. Batpack has a higher power density, but is less convinient if you have a jetpack. If you equip it, and drill one block, it appears to recharge 1 durability (not sure exactly how much energy) or 2 durability due to drain of 1. This means I have to mine a LOT to recharge my drill, and hence have a risk due to not having a jetpack on. In Ic1, the batpack was infinitely better, as it instead of just 1 durability, it restored ALL of the missing energy. Certainly it did require you to mine 1 block, but that was so easy to do, and hence was not nearly as annoying.
I think I went off on a tanget a bit.
Energy crystals can not be used out of base, and if you are manually transporting energy, you will almost certainly have laptron crystals by that point.