Lich vs clarity 2

[Troxx]

This may sound weird but hear me out before answering the following question:

Do any necromancers 49-59 ever settle for c2 when grouped with an enchanter? Assuming also you don't have a toon in group that can toss you a regen.

C2: 11mana/tick
Lich: 20mana/tick, -32hp a tick.

Being iksar and now 56, that regen mitigates the damage lost to 22 standing and 16 sitting. Having chloro/regrowth mitigates it by an additional 10/15. Assuming no regen buff, lich really only gives you an additional 9 mana a tick at the cost of losing points which then need to be healed or or tapped back - and those taps don't really break the 2:1 mana/heal ratio.

Pros for lich:
-not using it wastes your health regen potential. Unless you are tossing out heals, sitting at 100% health means wasted regen and thus wasted potential mana (dps/utility)
-9 more mana per tick, as above 90 more mana a minute to kill with
-in a mana feeding role, the faster you generate it the faster you can deal it.

Pros for using c2:
-mana used on more efficient damage spells vs using less efficient taps
-more flexibility with healing - less tapping required
-for the non iksar at level 56, not having to deal with 26 lost sitting 29 lost standing for only 9 extra mana/tick which equates to the difference of (at best) 18-20 (spec alteration) tap potential which doesn't even cover the *cost* of lich.
-maximizing tap efficiency without outside hp buffs is more challenging as you have to drop to reasonably low hp values (720 less than your max) to optimize self healing

Obviously this decision is more complicated 49-55 and for non iksar necros. They pay a steeper price in terms of lich health lost. It's less complicated for the iksar and any time you start tossing hp regen effects into the equation. Furthermore, this discussion is irrelevant when soloing or at level 60 when Demi lich allows for a 20 mana/tick advantage over c2.

So back to the question:

Do any of you or have any of you ever opted for c2 over lich when grouped with a level 54+ enchanter between levels 49-59?

If so (or not) care to discuss why?

Please bear in mind I'm not advocating for it, just curious. I haven't taken clarity over the lich line since clarity (higher lv cast) vs call of bones.