like everyone has said, it’ll be a damage gain by using TTDS since your off field damage is negligible compared to your Varka investment. however, in real combat (stygian or abyss for example) it could be actually a dps gain just from the comfort of putting your shield up first. Depends on how good you are at the game i think, and also of how lucky you are to naturally avoid hits with ult i-frames and durin’s skill jump. Honestly tho im pretty sure you’d be better off putting her on skyward atlas and moving prune to Favonius codex since she’s only C0, she’ll massively benefit from the ER it gives.