Lohith, is 10SS +1 for out of keyword, isn't an elemental, or and academic, so no synergy there, plus he's more powerful than pretty much any of Sandeep's henchmen.
Yes he is seriously powerful, has Kandara's main attack power, (thrown knives) and as you say healing, card draw, and soulstone.
For Sandeeps crew to get the similar powers he has to hire an SVG for a hard to get Card draw, Kandara for the attack with teleport (but harder to get, suit vs doing serious damage), and an Oxfordian mage to get a bit of healing.
Compare the new witness hire
Dabbler 5ss, and compare it with Oxfordian mage 6ss
At this rate, why play Sandeep at all, the witness seems to be doing a lot of what Sandeeps crew can do, but more efficiently, cheeper and with more synergistic features.