Shield Oath makes Sheltron useless.

[CaptnYesterday]

You can use sheltron approximately 50% more often under the new system, while in shield oath.

Nope. Reasons:
1. "50% more" is gated behind your 2xHoly Spirit, which takes away from other meaningful actions if the only reason you are casting Holy Spirit is to activate Sheltron. Clunky AF
2. Holy Spirit is not free. Now you are eating into mana that you may have wanted for something like Clemency, right?
3. Pre L64 content does not even have this situational option

Just because you can technically do something does not negate the argument that, in 'real world' terms, is still a loss. We still call it a "derp".